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Changing/Switching the Windows 7 input language using java

Have read old questions similar to this none of them helped my case.

OS: Windows 7 x64

Language Inputs:

enter image description here

I want to switch the language to Malayalam(India)[Google Input tools] for only one jTextField in Java Swing application and switch back to English(United States) for the rest of the fields.

UPDATE:

The field malyalamField is a javax.swing.JTextField

       javax.swing.JTextField malyalamField= new javax.swing.JTextField();
       malyalamField.setFont(new java.awt.Font("Arial Unicode MS", 0, 12));

Malayalam(India): A regional language used in the South Indian state named Kerala.

I tried to achieve that by firing the Alt + LShift key combo from java on the FocusGained and FocusGained events

int keyInput[] = { KeyEvent.VK_ALT, KeyEvent.VK_SHIFT};
Robot shiftkey=null;
Robot altkey=null;
try {
    shiftkey = new Robot();
    altkey=new Robot();
} catch (AWTException e) {
    e.printStackTrace();
}

altkey.keyPress(keyInput[0]);
shiftkey.keyPress(keyInput[1]);

altkey.keyRelease(keyInput[0]);
shiftkey.keyRelease(keyInput[1]);

(See bottom of post)

This works sometimes and sometimes it doesn't a little erratic behavior was observed. Sometimes it does not change back to English(United States) on FocusLost events even after the code getting executed.
enter image description here

I also tried using

         malyalamField.enableInputMethods(true);
         malyalamField.getInputContext().selectInputMethod(new Locale("MY", "IN"));

But this also did not work and selectInputMethod() returned NULL

I might be doing the selectInputMethod() with a wrong Locale

As of now the best I have is to fire the keystrokes from java.Is there a way this can be achieved?

SAMPLE CODE :

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;

public class LanguageChangeForm extends javax.swing.JFrame {
    public LanguageChangeForm() {
        initComponents();
    }
    @SuppressWarnings("unchecked")
    private void initComponents() {

        englishField1 = new javax.swing.JTextField();
        malayalamFileld = new javax.swing.JTextField();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        englishField2 = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        malayalamFileld.setFont(new java.awt.Font("Arial Unicode MS", 0, 11)); 
        malayalamFileld.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusGained(java.awt.event.FocusEvent evt) {
                malayalamFileldFocusGained(evt);
            }
            public void focusLost(java.awt.event.FocusEvent evt) {
                malayalamFileldFocusLost(evt);
            }
        });

        jLabel1.setText("English Field");
        jLabel2.setText("Malayalam Field");
        jLabel3.setText("English Field");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(47, 47, 47)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(englishField2, javax.swing.GroupLayout.PREFERRED_SIZE, 131, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 131, Short.MAX_VALUE)
                            .addComponent(englishField1))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 49, Short.MAX_VALUE)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(malayalamFileld, javax.swing.GroupLayout.PREFERRED_SIZE, 139, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 96, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(34, 34, 34))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(49, 49, 49)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jLabel2))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(englishField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(malayalamFileld, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(jLabel3)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(englishField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(152, Short.MAX_VALUE))
        );

        pack();
    }

    private void malayalamFileldFocusGained(java.awt.event.FocusEvent evt) {
        try{
        int keyInput[] = { KeyEvent.VK_ALT, KeyEvent.VK_SHIFT,,KeyEvent.VK_2};
        Robot robitkey=null;

        try {
            robitkey= new Robot();

        } catch (AWTException e) {

            e.printStackTrace();
        }
            robitkey.keyPress(keyInput[0]);
            robitkey.keyPress(keyInput[1]);
            robitkey.keyPress(keyInput[2]);
            robitkey.keyRelease(keyInput[0]);
            robitkey.keyRelease(keyInput[1]);
            robitkey.keyRelease(keyInput[2]);
        }catch(Exception e){
            e.printStackTrace();
        }
    }

    private void malayalamFileldFocusLost(java.awt.event.FocusEvent evt) {


        try{
        int keyInput[] = { KeyEvent.VK_ALT, KeyEvent.VK_SHIFT,,KeyEvent.VK_1};
        Robot robitkey=null;

        try {
            robitkey= new Robot();

        } catch (AWTException e) {

            e.printStackTrace();
        }
            robitkey.keyPress(keyInput[0]);
            robitkey.keyPress(keyInput[1]);
            robitkey.keyPress(keyInput[2]);
            robitkey.keyRelease(keyInput[0]);
            robitkey.keyRelease(keyInput[1]);
            robitkey.keyRelease(keyInput[2]);
        }catch(Exception e){
            e.printStackTrace();
        }

    }
    public static void main(String args[]) {
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(LanguageChangeForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(LanguageChangeForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(LanguageChangeForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(LanguageChangeForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }

        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new LanguageChangeForm().setVisible(true);
            }
        });
    }
    private javax.swing.JTextField englishField1;
    private javax.swing.JTextField englishField2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JTextField malayalamFileld;

}
like image 893
Sangeet Menon Avatar asked Apr 07 '15 16:04

Sangeet Menon


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Press the Windows logo key and type Control to search for the Control Panel app. Click Control Panel. Under Clock, Language, and Region, click Change input methods.

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Press and hold the Windows key on your keyboard. Press the space bar at the same time. The window with layouts will appear. You can select the right language with every press on the space bar.


1 Answers

This is locale you need:

Locale loc = new Locale("ml", "IN");
malayalamFileld.setLocale(loc);
malayalamFileld.getInputContext().selectInputMethod(loc);

But you need to know that this works only if user that started your program is Administrator/Root!!!

like image 95
akuzmitski Avatar answered Sep 23 '22 14:09

akuzmitski