jtextareademo.java

Swing入门必看 Swing Demo

package components;

import java.awt.Container;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.border.LineBorder;

public class JTextAreaDemo extends JFrame {

	private static final long serialVersionUID = 1L;

	public JTextAreaDemo() {
		Container container = getContentPane();
		container.setLayout(new FlowLayout());
		JTextArea[] textAreas = new JTextArea[4];
		JScrollPane[] scrollPanes = new JScrollPane[4];
		textAreas[0] = new JTextArea();
		textAreas[1] = new JTextArea("String");
		textAreas[2] = new JTextArea(3,20);
		textAreas[3] = new JTextArea("String",3,20);
		
		// # JTextArea methods
//		textArea.setLineWrap(true);
//		textArea.setWrapStyleWord(false);
		// append(String str), insert(String str, int pos)
//		textAreas[3].setLineWrap(true);
		for (int i = 0; i < textAreas.length; i++) {
			textAreas[i].setBorder(LineBorder.createBlackLineBorder());
			scrollPanes[i] = new JScrollPane(textAreas[i]);
			scrollPanes[i].setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
			scrollPanes[i].setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
			container.add(scrollPanes[i]);
		}		
		textAreas[3].append("append");
		textAreas[3].insert("insert", 2);
		textAreas[3].setLineWrap(true);
		textAreas[3].setWrapStyleWord(true);
		setSize(300,300);
		setVisible(true);
	}

	
	public static void main(String[] args) {
		JTextAreaDemo application = new JTextAreaDemo();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		

	}

}