JTextField has wrong text render on RIGHT_TO_LEFT component orientation We need a workaround, since whenever JTextField is filled with text that contains: Right to left text like Arabic, Latin numbers, and Latin text. Then JTextField renders text parts at unexpected locations. (It only renders right if the complete text Fits inside the JTextField.) The text we use to reproduce is:

JTextField has wrong text render on RIGHT_TO_LEFT component orientation

We need a workaround, since whenever JTextField is filled with text that contains:

Right to left text like Arabic,
Latin numbers,
and Latin text.

Then JTextField renders text parts at unexpected locations.

(It only renders right if the complete text Fits inside the JTextField.)

The text we use to reproduce is:

صندوق ۴۰×۳۰ پایه دار وایرنگ میتر تک فاز

Other info:

Above text is just name of a product, added inside an accounting software we created, but our users have match more render failures than we could reproduce.
We reported at: JDK-8194733
We have no experience with a custom-render in Java to make workaround, but render of entire text not considering the limit, and clipping that, should do the trick.

Source code for an executable test case:

//
// Like you may notice, below code shows simple JTextField, 
// but once you resize the Window smaller than the text Fits,
// then you experience numbers dancing (moving around randomly).
//
// And trying to select parts of text is even more fatal (random parts are rendered).
//
package test;

import java.awt.ComponentOrientation;

public class JavaBug extends javax.swing.JFrame {

    public static void main(String[] args) {
        JavaBug frame = new JavaBug();
        frame.show();
    }
    
    public JavaBug() {
        javax.swing.JTextField textField = new javax.swing.JTextField();
        
        textField.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N
        
        // Below is just name of a product, added inside an accounting software.
        textField.setText("u0635u0646u062Fu0648u0642 u06F4u06F0×u06F3u06F0 u067Eu0627u06CCu0647 u062Fu0627u0631 u0648u0627u06CCu0631u0646u06AF u0645u06CCu062Au0631 u062Au06A9 u0641u0627u0632");
        textField.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        
        getContentPane().add(textField);
        pack();
        this.setLocationRelativeTo(null); //enusre get showed at screen center
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    }
}

JavaScript
​x
 
//// Like you may notice, below code shows simple JTextField, // but once you resize the Window smaller than the text Fits,// then you experience numbers dancing (moving around randomly).//// And trying to select parts of text is even more fatal (random parts are rendered).//package test;​import java.awt.ComponentOrientation;​public class JavaBug extends javax.swing.JFrame {​    public static void main(String[] args) {        JavaBug frame = new JavaBug();        frame.show();    }        public JavaBug() {        javax.swing.JTextField textField = new javax.swing.JTextField();                textField.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N                // Below is just name of a product, added inside an accounting software.        textField.setText("u0635u0646u062Fu0648u0642 u06F4u06F0×u06F3u06F0 u067Eu0627u06CCu0647 u062Fu0627u0631 u0648u0627u06CCu0631u0646u06AF u0645u06CCu062Au0631 u062Au06A9 u0641u0627u0632");        textField.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);                getContentPane().add(textField);        pack();        this.setLocationRelativeTo(null); //enusre get showed at screen center        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);    }}​

Screen shots

Just running above code results to:

After resize, to something less:

Development Kit or Runtime version:

java version “1.8.0_25”
Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
Java HotSpot(TM) Client VM (build 25.25-b02, mixed mode)

Answer

You can try this

import javax.swing.*;
import javax.swing.text.html.HTMLEditorKit;
import java.awt.*;

public class JavaBug extends javax.swing.JFrame {

    public static void main(String[] args) {
        JavaBug frame = new JavaBug();
        frame.show();
    }

    public JavaBug() {
        JTextPane textPane = new JTextPane();
        textPane.setEditorKit(new HTMLEditorKit());
        textPane.setText("<html><font size='+2'>u0635u0646u062Fu0648u0642 u06F4u06F0×u06F3u06F0 u067Eu0627u06CCu0647 u062Fu0627u0631 u0648u0627u06CCu0631u0646u06AF u0645u06CCu062Au0631 u062Au06A9 u0641u0627u0632</font></html>");
        textPane.getDocument().putProperty("i18n", Boolean.TRUE);
        JPanel noWrapPanel = new JPanel( new BorderLayout() );
        noWrapPanel.add( textPane );
        JScrollPane scrollPane = new JScrollPane( noWrapPanel );
        scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);

        /* without below right to left force there is an other bug when we press home and
         * try to navigate to end using left key it will never get at end and fall back at start. kind of crazy bug */
        java.util.Locale arabic = new java.util.Locale("ar", "KW");
        ComponentOrientation arabicOrientation = ComponentOrientation.getOrientation(arabic);
        textPane.applyComponentOrientation(arabicOrientation);

        getContentPane().add(scrollPane);
        pack();
        this.setLocationRelativeTo(null); //enusre get showed at screen center
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    }
}

JavaScript
 
import javax.swing.*;import javax.swing.text.html.HTMLEditorKit;import java.awt.*;​public class JavaBug extends javax.swing.JFrame {​    public static void main(String[] args) {        JavaBug frame = new JavaBug();        frame.show();    }​    public JavaBug() {        JTextPane textPane = new JTextPane();        textPane.setEditorKit(new HTMLEditorKit());        textPane.setText("<html><font size='+2'>u0635u0646u062Fu0648u0642 u06F4u06F0×u06F3u06F0 u067Eu0627u06CCu0647 u062Fu0627u0631 u0648u0627u06CCu0631u0646u06AF u0645u06CCu062Au0631 u062Au06A9 u0641u0627u0632</font></html>");        textPane.getDocument().putProperty("i18n", Boolean.TRUE);        JPanel noWrapPanel = new JPanel( new BorderLayout() );        noWrapPanel.add( textPane );        JScrollPane scrollPane = new JScrollPane( noWrapPanel );        scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);        scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);​        /* without below right to left force there is an other bug when we press home and         * try to navigate to end using left key it will never get at end and fall back at start. kind of crazy bug */        java.util.Locale arabic = new java.util.Locale("ar", "KW");        ComponentOrientation arabicOrientation = ComponentOrientation.getOrientation(arabic);        textPane.applyComponentOrientation(arabicOrientation);​        getContentPane().add(scrollPane);        pack();        this.setLocationRelativeTo(null); //enusre get showed at screen center        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);    }}​

JTextField render bug if Text-Not-Fitting (JDK 7 till 18)

JTextField has wrong text render on RIGHT_TO_LEFT component orientation

Source code for an executable test case:

Screen shots

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Answer