Java get degree from radian

Complete source code below just a simple java program that we can use to get degree value from radian value.

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COMPLETE SOURCE CODE FOR : GetDegreeFromRadian.java
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::Click Here To Download This Java Source Code::

public class GetDegreeFromRadian
{
public static void main(String[]args)
{
 //CHANGE RADIAN VALUE TO WHAT VALUE THAT YOU WANT
 double radian=1.00;

 //PRINT ANGLE VALUE THAT WE GET FROM RADIAN
 System.out.println( "IT'S ANGLE IS : " + radian* (180/Math.PI) );
}
}

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Get last selected JRadioButton

Complete source code below will show you, how to get last selected JRadioButton when we click on other JRadioButton. I hope you will understand what i want to tell you, or you can try to compile and execute source code below.

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COMPLETE SOURCE CODE FOR : GetLastSelectedJRadioButton.java
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import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class GetLastSelectedJRadioButton implements ItemListener
{
JRadioButton jrd1=new JRadioButton("a");
JRadioButton jrd2=new JRadioButton("b");
JRadioButton jrd3=new JRadioButton("c");
JRadioButton jrd4=new JRadioButton("d");

JRadioButton last=null;

ButtonGroup bg=new ButtonGroup();

JFrame myFrame=new JFrame("Get last selected JRadioButton");

public GetLastSelectedJRadioButton()
{
 jrd1.addItemListener(this);
 jrd2.addItemListener(this);
 jrd3.addItemListener(this);
 jrd4.addItemListener(this);

 bg.add(jrd1);
 bg.add(jrd2);
 bg.add(jrd3);
 bg.add(jrd4);

 myFrame.getContentPane().setLayout(new GridLayout(4,1));

 myFrame.getContentPane().add(jrd1);
 myFrame.getContentPane().add(jrd2);
 myFrame.getContentPane().add(jrd3);
 myFrame.getContentPane().add(jrd4);

 myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 myFrame.setSize(400,400);
 myFrame.setLocationRelativeTo(null);
 myFrame.setVisible(true);
}

public void itemStateChanged(ItemEvent event)
{
 JRadioButton temp=(JRadioButton)event.getItem();

 if(event.getStateChange()==ItemEvent.DESELECTED)
 {
  last=temp;
 }
 else if(event.getStateChange()==ItemEvent.SELECTED)
 {
  if(last!=null)
  {
   JOptionPane.showMessageDialog(myFrame,"LAST : "+last.getText(),"Last",JOptionPane.INFORMATION_MESSAGE);
  }
 }
}

public static void main(String[]args)
{
 GetLastSelectedJRadioButton glsjrb=new GetLastSelectedJRadioButton();
}
}

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Get current second

Complete source code below, will show you how to get current computer second and print the value. The second value that it get is second value at program executing time.

>>Get current minute
>>Get current hour
>>Get current computer time in java

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COMPLETE SOURCE CODE FOR : GetCurrentSecond.java
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import java.util.Date;

public class GetCurrentSecond
{
public static void main(String[]args)
{
Date myDate=new Date();

//Get current second
int currentSecond=myDate.getSeconds();

//Print current second that we get
System.out.println("Current second is : "+currentSecond);
}
}

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Get current minute

Complete source code below will print current computer minute.

>>Get current second
>>Get current hour
>>Get current computer time in java

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COMPLETE SOURCE CODE FOR : GetCurrentMinute.java
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import java.util.Date;

public class GetCurrentMinute
{
public static void main(String[]args)
{
 Date myDate=new Date();

 //Get current minute
 int currentMinute=myDate.getMinutes();

 //Print current minute that we get
 System.out.println("Current minute is : "+currentMinute);
}
}

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Get current hour

Complete source code below will print current computer hour in soldier time format.Soldier time format is 24 hour format.

>>Get current minute
>>Get current second
>>Get current computer time in java

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COMPLETE SOURCE CODE FOR : GetCurrentHour.java
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import java.util.Date;

public class GetCurrentHour
{
public static void main(String[]args)
{
 Date myDate=new Date();

 //Get current hour in soldier time format
 int currentHour=myDate.getHours();

 //Print current hour that we get
 System.out.println("Current hour is : "+currentHour);
}
}

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Get current computer time in java

Complete source code below will show you, how to get current computer time in java.

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COMPLETE SOURCE CODE FOR : GetCurrentTime.java
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import java.util.Date;

public class GetCurrentTime
{
public static void main(String[]args)
{
Date myDate=new Date();

System.out.println(myDate.getHours()+":"+myDate.getMinutes()+":"+myDate.getSeconds());
}
}

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Get date using Calendar class

Complete source code below will show you, how to get date on local computer in java using Calendar class.

import java.util.Calendar;
import java.util.Locale;

public class GetDate
{
public static void main(String[]args)
{
 //Get a calendar using the default time zone and locale.
 Calendar currentComputerDate=Calendar.getInstance();

 //Print date
 System.out.print(currentComputerDate.get(Calendar.DATE));
 System.out.print(".");

 /*Print month in text representation. For example January is first month.
  *Month that will print is in long representation.
  *Short representation for January is Jan
  *You can try to change Calendar.LONG to Calendar.SHORT
  *Local.ROOT is useful constant for the root locale.
  */
    System.out.print(currentComputerDate.getDisplayName(Calendar.MONTH,Calendar.LONG,Locale.ROOT));
 System.out.print(".");

 //Print year
 System.out.print(currentComputerDate.get(Calendar.YEAR));
}
}

Get selected JRadioButton from ButtonGroup

Complete source code below will show you, how to get selected JRadioButton from ButtonGroup.

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COMPLETE SOURCE CODE FOR : GetSelectedJRadioButtonFromButtonGroup.java
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import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JOptionPane;
import javax.swing.AbstractButton;

import java.awt.BorderLayout;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import java.util.Enumeration;

public class GetSelectedJRadioButtonFromButtonGroup implements ActionListener
{
//Create two radio button that will be put into a group
//Set start radio button selection to female
JRadioButton firstRadioButton=new JRadioButton("Female",true);
JRadioButton secondRadioButton=new JRadioButton("Male");

//Create a button with text ( What i select )
JButton button=new JButton("What i select");

//Create a window using JFrame with title ( Get selected JRadioButton from ButtonGroup)
JFrame frame=new JFrame("Get selected JRadioButton from ButtonGroup");

//Create a radio button group using ButtonGroup
ButtonGroup bg=new ButtonGroup();

public GetSelectedJRadioButtonFromButtonGroup()
{
 //Add all radio button into created group
 bg.add(firstRadioButton);
 bg.add(secondRadioButton);

 //Set JFrame layout to border layout
 frame.setLayout(new BorderLayout());

 //Create a panel that will be put radio button into it
 JPanel panel=new JPanel();

 //Add all created radio button into panel
 panel.add(firstRadioButton);
 panel.add(secondRadioButton);

 //Add action listener to created button
 button.addActionListener(this);

 //Add panel and button into JFrame
 frame.add(panel,BorderLayout.CENTER);
 frame.add(button,BorderLayout.SOUTH);

 //Set default close operation for JFrame
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 //Set JFrame size
 frame.setSize(600,150);

 //Make JFrame visible
 frame.setVisible(true);
}

   //Action for button
   //Get selected JRadioButton from ButtonGroup
public void actionPerformed(ActionEvent event)
{
 if(event.getSource()==button)
 {
  Enumeration<AbstractButton> allRadioButton=bg.getElements();
 
  while(allRadioButton.hasMoreElements())
  {
   JRadioButton temp=(JRadioButton)allRadioButton.nextElement();
   if(temp.isSelected())
   {
    JOptionPane.showMessageDialog(frame,"You select : "+temp.getText());
   }
  }
 }
}

public static void main(String[]args)
{
 GetSelectedJRadioButtonFromButtonGroup gsjrbfbg=new  GetSelectedJRadioButtonFromButtonGroup();
}
}

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Get default JFrame background color

Complete source code below will show you, how to get default JFrame background color and after that, it will print RED,GREEN,BLUE(RGB) value for the color.

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COMPLETE SOURCE CODE FOR : GetDefaultJFrameBackgroundColor.java
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import javax.swing.JFrame;

import java.awt.Color;

public class GetDefaultJFrameBackgroundColor
{
public static void main(String[]args)
{
 //Create a window using JFrame
 JFrame frame=new JFrame();

 //Get JFrame background color using method getBackground()
 Color frameBackgroundColor=frame.getBackground();

 //Get RED value from color
 int redValue=frameBackgroundColor.getRed();

 //Get GREEN value from color
 int greenValue=frameBackgroundColor.getGreen();

 //Get BLUE value from color
 int blueValue=frameBackgroundColor.getBlue();

 //Print RGB value that we get
 System.out.println("R : "+redValue);
 System.out.println("G : "+greenValue);
 System.out.println("B : "+blueValue);

 //You can check what color that match the RGB value that we get using 'Color picker' at above
}
}

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Get default JPanel background color

Complete source code below will show you, how to get default JPanel background color and after that, it will print RED,GREEN,BLUE(RGB) value for the color.

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COMPLETE SOURCE CODE FOR : GetDefaultJPanelBackgroundColor.java
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import javax.swing.JPanel;

import java.awt.Color;

public class GetDefaultJPanelBackgroundColor
{
public static void main(String[]args)
{
 //Create a panel using JPanel
 JPanel panel=new JPanel();

 //Get panel background color using method getBackground()
 Color panelBackgroundColor=panel.getBackground();

 //Get RED value from color
 int redValue=panelBackgroundColor.getRed();

 //Get GREEN value from color
 int greenValue=panelBackgroundColor.getGreen();

 //Get BLUE value from color
 int blueValue=panelBackgroundColor.getBlue();

 //Print RGB value that we get
 System.out.println("R : "+redValue);
 System.out.println("G : "+greenValue);
 System.out.println("B : "+blueValue);

 //You can check what color that match the RGB value that we get using 'Color picker' at above
}
}

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Get default JLabel background color

Complete source code below will show you, how to get default JLabel background color and after that, it will print RED,GREEN,BLUE(RGB) value for the color.

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COMPLETE SOURCE CODE FOR : GetDefaultJLabelBackgroundColor.java
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import javax.swing.JLabel;

import java.awt.Color;

public class GetDefaultJLabelBackgroundColor
{
public static void main(String[]args)
{
 //Create a label using JLabel
 JLabel label=new JLabel();

 //Get label background color using method getBackground()
 Color labelBackgroundColor=label.getBackground();

 //Get RED value from color
 int redValue=labelBackgroundColor.getRed();

 //Get GREEN value from color
 int greenValue=labelBackgroundColor.getGreen();

 //Get BLUE value from color
 int blueValue=labelBackgroundColor.getBlue();

 //Print RGB value that we get
 System.out.println("R : "+redValue);
 System.out.println("G : "+greenValue);
 System.out.println("B : "+blueValue);

 //You can check what color that match the RGB value that we get using 'Color picker' at above
}
}

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Get current cursor location in JTextArea

Complete source code below will show you, how to get current cursor location in JTextArea.

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COMPLETE SOURCE CODE FOR : GetCurrentCursorLocationInJTextArea.java
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import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

public class GetCurrentCursorLocationInJTextArea extends JTextArea implements MouseMotionListener
{
//Create window using JFrame with title ( Get current cursor location in JTextArea )
JFrame frame=new JFrame("Get current cursor location in JTextArea");

//Create text field that will show you, current cursor location
JTextField textFieldX=new JTextField(5);
JTextField textFieldY=new JTextField(5);

//Create label that will use to describe function for each text field
JLabel labelX=new JLabel("Coordinate X : ");
JLabel labelY=new JLabel("Coordinate Y : ");

//Create panel that will use to store text field and label
JPanel panelX=new JPanel();
JPanel panelY=new JPanel();

//Panel that will use to store panelX and panelY
JPanel container=new JPanel();

public GetCurrentCursorLocationInJTextArea()
{
 //Add mouse motion listener to JTextArea
 addMouseMotionListener(this);

 //Set container layout using BorderLayout
 container.setLayout(new BorderLayout());

 //Set panelX and panelY layout using GridLayout
 panelX.setLayout(new GridLayout(1,2));
 panelY.setLayout(new GridLayout(1,2));

 //Add labelX and textFieldX into panelX
 panelX.add(labelX);
 panelX.add(textFieldX);

 //Add labelY and textFieldY into panelY
 panelY.add(labelY);
 panelY.add(textFieldY);

 //Add panelX and panelY into container
 container.add(panelX,BorderLayout.WEST);
 container.add(panelY,BorderLayout.EAST);

 //Set frame layout using BorderLayout
 frame.setLayout(new BorderLayout());

 //Add JTextArea  into JFrame
 frame.add(this,BorderLayout.CENTER);

 //Add container into JFrame
 frame.add(container,BorderLayout.SOUTH);

 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setSize(500,500);
 frame.setVisible(true);
}

public void mouseMoved(MouseEvent event)
{
 //Get current X-coordinate for cursor
 textFieldX.setText("");
 textFieldX.setText(Integer.toString(event.getX()));

 //Get current Y-coordinate for cursor
 textFieldY.setText("");
 textFieldY.setText(Integer.toString(event.getY()));
}

public void mouseDragged(MouseEvent event)
{
 //Do nothing because our case not handle dragging
}

public static void main(String[]args)
{
 GetCurrentCursorLocationInJTextArea gcclijta=new GetCurrentCursorLocationInJTextArea();
}
}

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Get index of character from String

Complete source code below will show you, how to get index of a character from a String.

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COMPLETE SOURCE CODE FOR : GetIndexOfCharacterFromString.java
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public class GetIndexOfCharacterFromString
{
public static void main(String[]args)
{
 //Create a String
 String a="ABCD";

 //Create an int variable that will store index for character C
 int index=a.indexOf('C');

 //Print index that we get
 System.out.println("Index for C is : "+index);
}
}

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Get substring from String

Complete source code below will show you, how to get substring from a String.

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COMPLETE SOURCE CODE FOR : GetSubstringFromString.java
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public class GetSubstringFromString
{
public static void main(String[]args)
{
 //This source code will show you how to get substring from a String
 //We will get String "love" from String "I love you"
 String a="I love you";

 //We will use substring() method
 //2=index in "I love you" for 'l'
 //6=(index in "I love you" for 'e')+1
 String b=a.substring(2,6);

 //Print substring that we get
 System.out.println(b);
}
}

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Get character from String

Complete source code below will show you, how to get character from a String in java.

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COMPLETE SOURCE CODE FOR : GetCharacterFromString.java
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public class GetCharacterFromString
{
public static void main(String[]args)
{
 //Create a String that will be use to get character from it
 String a="Hello!";

 /**
  *If you want to get character in a String,
  *you can use charAt method from String class.
  *Just put index of the character in it's argument.
  *For your information index in String is start with
  *0....so
  *index 0 is for H
  *index 1 is for e
  *index 2 is for l
  *index 3 is for l
  *index 4 is for o
  *index 5 is for !
  **/
 
 //Get first character in the String
 char characterFirst=a.charAt(0);

 //Print the first character that we get
 System.out.println(characterFirst);
}
}

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Get char array from String

Complete source code below will show you, how to get char array from a String. This char array we will store all characters in the String include white space.

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COMPLETE SOURCE CODE FOR : GetCharArrayFromString.java
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public class GetCharArrayFromString
{
public static void main(String[]args)
{
 //Create a String that we want to get character from it
 //You can try other String that you want
 String a="Get char array from String.........";

 //Create an array from type char that will store all characters from String
 //Method toCharArray() will get all characters in the String
 char[]storeAllStringCharacter=a.toCharArray();

 //Print number of characters in char array
 System.out.println("Number of characters in char array is : "+storeAllStringCharacter.length+"\n\n");

 //Print all character in char array include their index in String
 System.out.println("*******************************");
 System.out.println("THE CHARACTER IS : ");
 System.out.println("*******************************");
 System.out.println();

 for(int i=0; i<storeAllStringCharacter.length; i++)
 {
  System.out.println("Character at index "+i+" in the String is : "+storeAllStringCharacter[i]);
 }
}
}

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Get String from char array

Complete source code below will show you, how to get String from char array.

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COMPLETE SOURCE CODE FOR : GetStringFromCharArray.java
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public class GetStringFromCharArray
{
public static void main(String[]args)
{
 //Create an array from char type that will store all character for a String
 char[]allCharacter=new char[12];

 //Set all value in created array
 allCharacter[0]='H';
 allCharacter[1]='e';
 allCharacter[2]='l';
 allCharacter[3]='l';
 allCharacter[4]='o';
 allCharacter[5]=' ';
 allCharacter[6]='W';
 allCharacter[7]='o';
 allCharacter[8]='r';
 allCharacter[9]='l';
 allCharacter[10]='d';
 allCharacter[11]='!';

 //Get String from created char array
 String resultString=new String(allCharacter);

 //Print result
 System.out.println(resultString);
}
}

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Get numbers of character in a string

Complete source code below will show you, how to get numbers of character that contain in a String. If you compile and execute source code below, you will get numbers of character is equal to 15 not 14. This is because the whitespace in a String also count.

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COMPLETE SOURCE CODE FOR : GetNumbersOfCharacterInAString.java
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public class GetNumbersOfCharacterInAString
{
public static void main(String[]args)
{
 //Create a String
 //You can change to other String that you want
 String a="Hello everybody";

 //Get numbers of character in created String and store it in int variable
 int numbersOfCharacter=a.length();

 //Print result
 System.out.println("Numbers of character is : "+numbersOfCharacter);
}
}

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Get selected JCheckBox

Complete source code below will show you, how to get selected JCheckBox.

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COMPLETE SOURCE CODE FOR : GetSelectedJCheckBox.java
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import javax.swing.JFrame;
import javax.swing.JCheckBox;
import javax.swing.JButton;
import javax.swing.JOptionPane;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class GetSelectedJCheckBox implements ActionListener
{
//Create String that will be use to hold selected JCheckBox text
String selectedCheckBox="";

//Create check box using JCheckBox
JCheckBox checkBox1=new JCheckBox("Duck");
JCheckBox checkBox2=new JCheckBox("Chicken");
JCheckBox checkBox3=new JCheckBox("Cow");
JCheckBox checkBox4=new JCheckBox("Sheep");

//Create button using JButton with text ( Get selected JCheckBox )
JButton button=new JButton("Get selected JCheckBox");

//method actionPerformed that we override because we implement ActionListener
public void actionPerformed(ActionEvent event)
{
 //Action for button
 if(event.getSource()==button)
 {
  //Check first JCheckBox is selected or not
  if(checkBox1.isSelected())
  {
   selectedCheckBox=selectedCheckBox+checkBox1.getText()+"\n";
  }
 
  //Check second JCheckBox is selected or not
  if(checkBox2.isSelected())
  {
   selectedCheckBox=selectedCheckBox+checkBox2.getText()+"\n";
  }
 
  //Check third JCheckBox is selected or not
  if(checkBox3.isSelected())
  {
   selectedCheckBox=selectedCheckBox+checkBox3.getText()+"\n";
  }
 
  //Check fourth JCheckBox is selected or not
  if(checkBox4.isSelected())
  {
   selectedCheckBox=selectedCheckBox+checkBox4.getText()+"\n";
  }
 
  //Show message that tell you, what check box that you selected
  JOptionPane.showMessageDialog(null,"Selected check box is : \n"+selectedCheckBox);
 
  //Make selectedCheckBox string like initial with empty string
  selectedCheckBox=new String("");
 }
}

//Constructor
public GetSelectedJCheckBox()
{
 //Create a window using JFrame with title ( Get selected JCheckBox )
 JFrame frame=new JFrame("Get selected JCheckBox");

 //Create layout that will be use by JFrame
 GridLayout gl=new GridLayout(5,1);

 //Add ActionListener to button
 button.addActionListener(this);

 //Set JFrame layout
 frame.setLayout(gl);

 //Add all created check box into JFrame
 frame.add(checkBox1);
 frame.add(checkBox2);
 frame.add(checkBox3);
 frame.add(checkBox4);

 //Add created button into JFrame
 frame.add(button);

 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setSize(350,200);
 frame.setVisible(true);
}

//Main method
public static void main(String[]args)
{
 GetSelectedJCheckBox gsjcb=new GetSelectedJCheckBox();
}
}

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Get selected JRadioButton

Complete source code below will show you, how to get selected JRadioButton.

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COMPLETE SOURCE CODE FOR : GetSelectedJRadioButton.java
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import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JOptionPane;

import java.awt.BorderLayout;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class GetSelectedJRadioButton implements ActionListener
{
//Create two radio button that will be put into a group
//Set start radio button selection to female
JRadioButton firstRadioButton=new JRadioButton("Female",true);
JRadioButton secondRadioButton=new JRadioButton("Male");

//Create a button with text ( What i select )
JButton button=new JButton("What i select");

//Create a window using JFrame with title ( Get selected JRadioButton )
JFrame frame=new JFrame("Get selected JRadioButton");

public GetSelectedJRadioButton()
{
 //Create a radio button group using ButtonGroup
 ButtonGroup bg=new ButtonGroup();

 //Add all radio button into created group
 bg.add(firstRadioButton);
 bg.add(secondRadioButton);

 //Set JFrame layout to border layout
 frame.setLayout(new BorderLayout());

 //Create a panel that will be put radio button into it
 JPanel panel=new JPanel();

 //Add all created radio button into panel
 panel.add(firstRadioButton);
 panel.add(secondRadioButton);

 //Add action listener to created button
 button.addActionListener(this);

 //Add panel and button into JFrame
 frame.add(panel,BorderLayout.CENTER);
 frame.add(button,BorderLayout.SOUTH);

 //Set default close operation for JFrame
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 //Set JFrame size
 frame.setSize(300,150);

 //Make JFrame visible
 frame.setVisible(true);
}

   //Action for button
public void actionPerformed(ActionEvent event)
{
 if(event.getSource()==button)
 {
  if(firstRadioButton.isSelected())
  {
   JOptionPane.showMessageDialog(frame,"You select : "+firstRadioButton.getText());
  }
 
  else if(secondRadioButton.isSelected())
  {
   JOptionPane.showMessageDialog(frame,"You select : "+secondRadioButton.getText());
  }
 }
}

public static void main(String[]args)
{
 GetSelectedJRadioButton gsjrb=new GetSelectedJRadioButton();
}
}

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