Java 实训_创建一个窗体模拟简单的数学加、减法测试界面

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package 实训三;

import java.awt.Button;
import java.awt.Frame;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Calculate {
	JFrame f = new JFrame("算术测试");
	Panel p = new Panel();
	Button button1 = new Button("获取题目");
	Button button2 = new Button("确认答案");
	static Label label1 = new Label("你还没有回答呢");
	TextField text1 = new TextField(20);
	TextField text2 = new TextField(20);
	TextField text3 = new TextField(20);

	public void show() {
		p.add(button1);
		button1.addActionListener(new oListener());
		p.add(text1);
		p.add(new Label("+"));
		p.add(text2);
		p.add(new Label("="));
		p.add(text3);
		p.add(button2);
		button2.addActionListener(new bListener());
		p.add(label1);
		f.add(p);
		f.setBounds(20, 30, 699, 300);
		f.setVisible(true);
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	class oListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent e) {
			// TODO Auto-generated method stub
			Random rand = new Random();
			String s = String.valueOf(rand.nextInt(100));
			String s1 = String.valueOf(rand.nextInt(100));
			text1.setText(s);
			text2.setText(s1);
			text1.setEditable(false);
			text2.setEditable(false);
		}

	}

	public class bListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent e) {
			// TODO Auto-generated method stub
			int a = Integer.valueOf(text1.getText());
			int b = Integer.valueOf(text2.getText());
			int c = 0;
			if (text3.getText().length() >= 1)
				c = Integer.valueOf(text3.getText());
			if (text3.getText().length() < 1) {
				label1.setVisible(true);
				label1.setBounds(399, 20, 90, 50);
			}

			else if (a + b == c) {
				System.out.println("Right!");
			} else {
				System.out.println("Wrong!");
			}
		}

	}

	public static void main(String[] args) {
		new Calculate().show();
		label1.setVisible(false);
	}

}