Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Dimension;
import java.awt.FontMetrics;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.TabSet;
import javax.swing.text.TabStop;

public class Main {
    public static void setTabs(JTextPane textPane, int charactersPerTab) {
        FontMetrics fm = textPane.getFontMetrics(textPane.getFont());
        int charWidth = fm.charWidth('w');
        int tabWidth = charWidth * charactersPerTab;

        TabStop[] tabs = new TabStop[5];

        for (int i = 0; i < tabs.length; i++) {
            int tab = i + 1;
            tabs[i] = new TabStop(tab * tabWidth);
        }

        TabSet tabSet = new TabSet(tabs);
        SimpleAttributeSet attributes = new SimpleAttributeSet();
        StyleConstants.setTabSet(attributes, tabSet);
        int length = textPane.getDocument().getLength();
        textPane.getStyledDocument().setParagraphAttributes(0, length, attributes, false);
    }

    public static void main(String[] args) {
        JTextPane textPane = new JTextPane();
        textPane.setText("12345678\n\t1\t2\t3a");
        JScrollPane scrollPane = new JScrollPane(textPane);
        scrollPane.setPreferredSize(new Dimension(700, 100));

        setTabs(textPane, 8);

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(scrollPane);
        frame.pack();
        frame.setVisible(true);
    }
}