Question

自学Java帮忙写个最简单的按钮监听:要求点击按钮后在文本框内显示"你好"

Answer 1

import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class Test89 {
    public static void main(String args[]) {
        //Jframe
        JFrame f = new JFrame();
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        final TextField text = new TextField(30);
        Button btn = new Button("点击");
        btn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                text.setText("你好");;
            }
        });


        f.setTitle("例子");
        f.setLayout(new FlowLayout());
        f.add(text);
        f.add(btn);
        f.setBackground(Color.WHITE);
        f.setSize(280, 100);


        f.setLocationRelativeTo(f);//position center.
        f.setVisible(true);//show.

    }
}

Answer 2

是使用java swing,还是android的技术,不过都大同小异,他已经提供了监听的函数,只需要直接调用就可以了.遇到问题可以贴出来