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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Put JRadioButton into list

Complete source code below will show you, how to put JRadioButton into list. During my try using java i found no way to put JRadioButton into JList. So i try to create it on my own. I hope you enjoy what i share with you.

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

import java.awt.GridLayout;

import java.awt.Color;

public class AddRadioButtonIntoList
{
public static void main(String[]args)
{
 //Create radio button using JRadioButton that will be put into list
 JRadioButton radioButton1=new JRadioButton("Duck");
 JRadioButton radioButton2=new JRadioButton("Sheep");
 JRadioButton radioButton3=new JRadioButton("Cow");
 JRadioButton radioButton4=new JRadioButton("Buffalo");
 JRadioButton radioButton5=new JRadioButton("Horse");
 JRadioButton radioButton6=new JRadioButton("Goat");

 //Set all radio button background color to white
 radioButton1.setBackground(Color.WHITE);
 radioButton2.setBackground(Color.WHITE);
 radioButton3.setBackground(Color.WHITE);
 radioButton4.setBackground(Color.WHITE);
 radioButton5.setBackground(Color.WHITE);
 radioButton6.setBackground(Color.WHITE);

 //Create button group for JRadioButton
 ButtonGroup bg=new ButtonGroup();

 //Add all created radio button into button group
 bg.add(radioButton1);
 bg.add(radioButton2);
 bg.add(radioButton3);
 bg.add(radioButton4);
 bg.add(radioButton5);
 bg.add(radioButton6);

 //Create panel that will be use to put all radio button into it
 JPanel panel=new JPanel(new GridLayout(6,1));

 //Add all created radio button into panel
 panel.add(radioButton1);
 panel.add(radioButton2);
 panel.add(radioButton3);
 panel.add(radioButton4);
 panel.add(radioButton5);
 panel.add(radioButton6);

 //Create scroll bar for created panel
 //Vertical scrollbar always show
 //Horizontal scrollbar never show
 JScrollPane scrollBar=new JScrollPane(panel,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

 //Create window using JFrame with title ( Add JRadioButton into list )
 JFrame frame=new JFrame("Add JRadioButton into list");

 //Add created scroll bar into JFrame
 frame.add(scrollBar);

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

 //Set JFrame size
 frame.setSize(400,100);

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

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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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Determine String end with specified word

Complete source code below will show you, how to determine whether a String end with specified word or not.

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COMPLETE SOURCE CODE FOR : DetermineStringEndWithWord.java
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public class DetermineStringEndWithWord
{
public static void main(String[]args)
{
 //First String
 //You can try change it
 String a="Hello";

 //Second String
 //You can try change it
 String b="llo";

 //Determine if first String end with second String or not
 //If yes, program will print YES, otherwise it will print NO
 if(a.endsWith(b))
 {
  System.out.println("YES");
 }
 else
 {
  System.out.println("NO");
 }
}
}

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Determine String start with specified word

Complete source code below will show you, how to determine whether a String start with specified word or not.

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COMPLETE SOURCE CODE FOR : DetermineStringStartWithWord.java
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public class DetermineStringStartWithWord
{
public static void main(String[]args)
{
 //First String
 //You can try change it
 String a="Hello";

 //Second String
 //You can try change it
 String b="Hel";

 //Determine if first String start with second String or not
 //If yes, program will print YES, otherwise it will print NO
 if(a.startsWith(b))
 {
  System.out.println("YES");
 }
 else
 {
  System.out.println("NO");
 }
}
}

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