Example usage for javax.swing JTextArea getLineOfOffset

Introduction

In this page you can find the example usage for javax.swing JTextArea getLineOfOffset.

Prototype

public int getLineOfOffset(int offset) throws BadLocationException 

Source Link

Document

Translates an offset into the components text to a line number.

Usage

From source file:MainClass.java

public static void main(String[] args) {
    JTextArea ta = new JTextArea();
    ta.setLineWrap(true);//from w ww  . j a v a2 s. co m
    ta.setWrapStyleWord(true);
    JScrollPane scroll = new JScrollPane(ta);

    ta.append("www.\n");
    ta.append("java2s\n");
    ta.append(".com");

    try {
        for (int n = 0; n < ta.getLineCount(); n += 1)
            System.out.println("line " + n + " starts at " + ta.getLineStartOffset(n) + ", ends at "
                    + ta.getLineEndOffset(n));
        System.out.println();

        int n = 0;
        while (true) {
            System.out.print("offset " + n + " is on ");
            System.out.println("line " + ta.getLineOfOffset(n));
            n += 1;
        }
    } catch (BadLocationException ex) {
        System.out.println(ex);
    }

    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(scroll, java.awt.BorderLayout.CENTER);
    f.setSize(150, 150);
    f.setVisible(true);
}

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From source file:OffsetTest.java

public static void main(String[] args) {
    JTextArea ta = new JTextArea();
    ta.setLineWrap(true);/*from  ww  w.j  ava  2 s  .  c o  m*/
    ta.setWrapStyleWord(true);
    JScrollPane scroll = new JScrollPane(ta);

    // Add three lines of text to the JTextArea.
    ta.append("The first line.\n");
    ta.append("Line Two!\n");
    ta.append("This is the 3rd line of this document.");

    // Print some results . . .
    try {
        for (int n = 0; n < ta.getLineCount(); n += 1)
            System.out.println("line " + n + " starts at " + ta.getLineStartOffset(n) + ", ends at "
                    + ta.getLineEndOffset(n));
        System.out.println();

        int n = 0;
        while (true) {
            System.out.print("offset " + n + " is on ");
            System.out.println("line " + ta.getLineOfOffset(n));
            n += 13;
        }
    } catch (BadLocationException ex) {
        System.out.println(ex);
    }

    // Layout . . .
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(scroll, java.awt.BorderLayout.CENTER);
    f.setSize(150, 150);
    f.setVisible(true);
}

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