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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JUST COMPILE AND EXECUTE IT
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Determine character location in a String

Now, i will share with you, how to determine location of a character in a String. Ok...firstly you must know location of a character in a String is determine using 'index'. Index for first character in a String is equal to 0 and each character include white space after that will add 1.

Note : Character location = index

String a="Hello dude";

Below is a list all character in String above with it's index.

H - 0
e - 1
l - 2
l - 3
o - 4
white space - 5
d - 6
u - 7
d - 8
e - 9

How to know current location of jframe after it moved to other location on screen

Result of the current location for a jframe in this program is current coordinate of the top left corner for the jframe.

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

import java.awt.event.ComponentListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;

import java.awt.Point;
import java.awt.Component;

public class HowToKnowCurrentLocationOfJframe extends ComponentAdapter
{
 JFrame b=new JFrame("TRY MOVE ME");
 
 public HowToKnowCurrentLocationOfJframe()
 {
  b.addComponentListener(this);
  
  b.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  b.setSize(400,100);
  b.setVisible(true);
 }
 
 public void componentMoved(ComponentEvent evt)
 {
  Component temp=(Component)evt.getSource();
  JOptionPane.showMessageDialog(null,"CURRENT LOCATION : "+" X = "+(temp.getLocationOnScreen()).getX()+" Y = "+(temp.getLocationOnScreen()).getY(),"CURRENT LOCATION",JOptionPane.INFORMATION_MESSAGE);
 }
 
 public static void main(String[]args)
 {
  HowToKnowCurrentLocationOfJframe myObject=new HowToKnowCurrentLocationOfJframe();
 }
}

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Set jframe size and it's location when click on maximize button

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COMPLETE SOURCE CODE FOR : SettingBound.java
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/**
 *THIS TUTORIAL WILL SHOW YOU HOW TO SET THE MAXIMUM SIZE OF YOUR FRAME 
 *AND IT'S LOCATION WHEN YOU CLICK
 *MAXIMIZE BUTTON BESIDE JFRAME CLOSE BUTTON
 **/
 
import java.awt.Rectangle;
import javax.swing.JFrame;

public class SettingBound
{
 public static void main(String[]args)
 {
  //first value, 400=x coordinate on your screen
  //second value, 400=y coordinate on your screen
  //third value, 800=JFrame width
  //fourth value, 200=JFrame height
  Rectangle rec=new Rectangle(400,400,800,200);
  
  JFrame frame1=new JFrame("Setting Bound");
  
  frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame1.setMaximizedBounds(rec);//set maximize setting for your JFrame
  frame1.setVisible(true);
 }
}

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JUST COMPILE AND EXECUTE IT
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