textareatest.java

中国水利水电出版社java程序设计教程,附源码

//TextAreaTest.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class TextAreaTest
{  
	public static void main(String[] args)
	{  
		TextAreaFrame frame = new TextAreaFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
	}
}

class TextAreaFrame extends JFrame
{
	public TextAreaFrame()
	{
		setTitle("TextAreaTest");
		setSize(WIDTH, HEIGHT);

		Container contentPane = getContentPane();

		//建立容纳文本区的面板
		JPanel textPanel = new JPanel();

		//新建无回绕的文本区，行数为5，列数为20
		noWrapArea = new JTextArea("nowrap", 5, 20);
		//新建有回绕的文本区，行数为5，列数为20
		wrapArea = new JTextArea("wraparea", 5, 20);
		wrapArea.setLineWrap(true);
		//新建带滚动条的文本区，行数为5，列数为20
		scrollArea = new JTextArea("scrollarea", 5, 20);
		//将文本区插入到滚动窗格中
		JScrollPane scrollPane = new JScrollPane(scrollArea);

		textPanel.add(noWrapArea);
		textPanel.add(wrapArea);
		//将滚动窗格加入到框架中
		textPanel.add(scrollPane);

		contentPane.add(textPanel);
	}

	public static final int WIDTH = 350;
	public static final int HEIGHT = 350;

	private JTextArea noWrapArea;
	private JTextArea wrapArea;
	private JTextArea scrollArea;
}