这是一篇关于GUI编写计算器的代码 - 黑马程序员技术交流社区

package gui;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class NewTestFrame extends FatherFrame{
private String s="";
private String[] s1 = new String[2];
private int[] a = new int[2];
//******************************************组件方法定义**********************************************************//
JFrame jf = new JFrame("我的窗体");//创建窗体
JPanel jp = new JPanel();//创建容器
JPanel jp1 = new JPanel();
JButton jb = new JButton("0");//创建按钮
JButton jb1 = new JButton("1");
JButton jb2 = new JButton("2");
JButton jb3 = new JButton("3");
JButton jb4 = new JButton("4");
JButton jb5 = new JButton("5");
JButton jb6 = new JButton("6");
JButton jb7 = new JButton("7");
JButton jb8 = new JButton("8");
JButton jb9 = new JButton("9");
JButton jb10 = new JButton("+");
JButton jb11 = new JButton("-");
JButton jb12 = new JButton("*");
JButton jb13 = new JButton("/");
JButton jb14 = new JButton("=");
JButton jb15 = new JButton("CE");
JTextField jtf = new JTextField(20);//创建文本
final JLabel label = new JLabel("=");//内部匿名类只能使用外部类的常量属性
/**
* @param args
*/
public void jiSuanQi(){
}
//*******************************************运算方法*******************************************//
public int jiaFa(int a,int b){//加法
return a+b;
}
public int jianFa(int a,int b){//减法
return a-b;
}
public int chengFa(int a,int b){//乘法
return a*b;
}
public int chuFa(int a,int b){//除法
return a/b;
}
@Override
public void initButton() {//添加按钮
// TODO Auto-generated method stub
//**********************************************按钮添加****************************************************//
jp.add(jtf);//向容器中添加文本框
jtf.setBounds(40, 20,400, 20);
jp.add(label);
label.setBounds(80, 20, 200, 20);
jp1.setLayout(new GridLayout(4,4,5,5));//网格布局4*4，间距5*5
jp1.add(jb);//向容器中添加按钮
jp1.add(jb1);
jp1.add(jb2);
jp1.add(jb3);
jp1.add(jb4);
jp1.add(jb5);
jp1.add(jb6);
jp1.add(jb7);
jp1.add(jb8);
jp1.add(jb9);
jp1.add(jb10);
jp1.add(jb11);
jp1.add(jb12);
jp1.add(jb13);
jp1.add(jb14);
jp1.add(jb15);
jf.add(jp,BorderLayout.NORTH);//向窗口中添加文本框，并将文本框放在北面
jf.add(jp1);//
}
@Override
public void initFrame() {//加载窗体
// TODO Auto-generated method stub
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置点击窗体关闭按钮时的效果
jf.setBounds(100, 100, 350, 350);//设置窗体的大小
jf.setResizable(false);//设置窗体是否可以拖拽
jf.setVisible(true);//设置窗体可以显示
}
@Override
public void initLayout() {//设置自定义布局
// TODO Auto-generated method stub
}
@Override
public void initListener() {
// TODO Auto-generated method stub
//*******************************************处理事件****************************************************//
ActionListener listener = new ActionListener(){
public void actionPerformed(ActionEvent e) {
//e.getActionCommand()
//随着按钮点击的不同获取不同按钮上的文字
if(!e.getActionCommand().equals("+")&&!e.getActionCommand().equals("-")&&!e.getActionCommand().equals("/")&&!e.getActionCommand().equals("*")&&!e.getActionCommand().equals("CE")&&!e.getActionCommand().equals("=")){
System.out.print(e.getActionCommand());//输出选择值
s += e.getActionCommand();//如果e.getActionCommand()不为=-*/+ce，则为0-9的数字，
}
if(e.getActionCommand().equals("+")||e.getActionCommand().equals("-")||e.getActionCommand().equals("/")||e.getActionCommand().equals("*")){
if(a[0] == 0){//如果是第一次计算，或清空后的重新计算，执行
a[0] = Integer.parseInt(s);
s = "";
s1[0] = e.getActionCommand();
System.out.print(e.getActionCommand());//输出选择值
}else{//累加计算执行
a[1] = Integer.parseInt(s);
if(s1[0].equals("+")){
a[0] = NewTestFrame.this.jiaFa(a[0], a[1]);
}else if(s1[0].equals("-")){
a[0] = NewTestFrame.this.jianFa(a[0], a[1]);
}else if(s1[0].equals("*")){
a[0] = NewTestFrame.this.chengFa(a[0], a[1]);
}else if(s1[0].equals("/")){
a[0] = NewTestFrame.this.chuFa(a[0], a[1]);
}
System.out.println();
System.out.print(a[0]);
System.out.print(e.getActionCommand());//输出选择值
s1[1] = "="+a[0];
label.setText(s1[1]);
s1[0] = e.getActionCommand();
a[1] = 0;
s="";
}
}
if(e.getActionCommand().equals("=")){//如果是等号执行
if(a[0] == 0){//
a[0] = Integer.parseInt(s);
s = "";
System.out.println();
System.out.println("结果为："+a[0]);
s1[1] = "="+a[0];
label.setText(s1[1]);
}else{
a[1] = Integer.parseInt(s);
if(s1[0].equals("+")){
a[0] = NewTestFrame.this.jiaFa(a[0], a[1]);
}else if(s1[0].equals("-")){
a[0] = NewTestFrame.this.jianFa(a[0], a[1]);
}else if(s1[0].equals("*")){
a[0] = NewTestFrame.this.chengFa(a[0], a[1]);
}else if(s1[0].equals("/")){
a[0] = NewTestFrame.this.chuFa(a[0], a[1]);
}
System.out.println();
System.out.print(e.getActionCommand());//输出选择值
System.out.print(a[0]);
s1[1] = "="+a[0];
label.setText(s1[1]);
s1[0] = e.getActionCommand();
a[1] = 0;
s="";
}
}
if(e.getActionCommand().equals("CE")){//如果是CE，清空
a[0] = 0;
a[1] = 0;
s = "";
s1[0] = "";
s1[1] = "=";
label.setText(s1[1]);
}
}
};
//******************************************加载事件*****************************************************//
jb.addActionListener(listener);//加载事件
jb1.addActionListener(listener);
jb2.addActionListener(listener);
jb3.addActionListener(listener);
jb4.addActionListener(listener);
jb5.addActionListener(listener);
jb6.addActionListener(listener);
jb7.addActionListener(listener);
jb8.addActionListener(listener);
jb9.addActionListener(listener);
jb10.addActionListener(listener);
jb11.addActionListener(listener);
jb12.addActionListener(listener);
jb13.addActionListener(listener);
jb14.addActionListener(listener);
jb15.addActionListener(listener);
}
@Override
public void initPostion() {
// TODO Auto-generated method stub
}
public static void main(String[] args) {//主方法
NewTestFrame ntf = new NewTestFrame();
ntf.init();
}
}

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