mycount.java

是一个综合开发程序,可以做为系统研究人员的参考

import java.awt.*;
import java.awt.event.*;

public class mycount {//extends Frame implements ActionListener
	static Frame frm =new Frame("this is my first count");
	static TextField text1 =new TextField();
	static TextField text2 =new TextField();
	static TextField text3 =new TextField();
	static Button but1 =new Button("计算");
	static Button but2 =new Button("清空");
	static Button but3=new Button("退出");
	public static void main(String[] args){
		frm.setLayout(null);
		frm.setLocation(300,150);
		Label lab1 =new Label("第一个数 :");
		Label lab2 =new Label("第二个数 :");
		Label lab3 =new Label("两数和为:");
		frm.setSize(250,200);
		lab1.setBounds(30,30,60,30);
		lab2.setBounds(30,70,60,30);
		lab3.setBounds(30,110,60,30);
		text1.setBounds(100,30,80,20);
		text2.setBounds(100,70,80,20);
		text3.setBounds(100,110,80,20);
		but1.setBounds(30,140,40,20);
		but2.setBounds(90,140,40,20);
		but3.setBounds(150,140,40,20);
		frm.add(lab1);
		frm.add(lab2);
		frm.add(lab3);
		frm.add(text1);
		frm.add(text2);
		frm.add(text3);
		frm.add(but1);
		frm.add(but2);
		frm.add(but3);
		but1.addActionListener(new acti());
		but2.addActionListener(new acti());
		but3.addActionListener(new acti());
		frm.show();
		
	}
	static class acti implements ActionListener{
		public void actionPerformed(ActionEvent e){//actionPerformed 的P要大写
			Button but=(Button) e.getSource();
			if (but == but1){
			String a,b;
			int x,y, c;
				a= text1.getText();
				b= text2.getText();
			    x =Integer.parseInt(a);//将String转换成整数