GUI學習筆記——03把文本框的值移動到文本域上

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package test;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class test4 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Frame f = new Frame("數據轉移");
		f.setBounds(400,200,400,300);
		f.setLayout(new FlowLayout());
		
		//創建文本框
		TextField tf = new TextField(20);
		//創建按鈕
		Button bu = new Button("數據轉移");
		//創建文本域
		TextArea ta = new TextArea(10,40);
		
		//把組件添加到窗體
		f.add(tf);
		f.add(bu);
		f.add(ta);
		
		//對按鈕添加事件
		bu.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				//獲取文本框的值,並且清除數據
				String tf_str = tf.getText().trim();
				tf.setText("");
				//給文本域
				ta.append(tf_str+"\r\n");
				
				//獲取光標
				tf.requestFocus();
			}
			
		});
		
		//設置窗體關閉，可見
		f.setVisible(true);
		//設置窗體關閉
		f.addWindowListener(new WindowAdapter() {
			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
		
	}

}