窗体

package Calc;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

/**

*

* 计算器程序62616964757a686964616fe59b9ee7ad9431333337613835

*

*/

public class CalcFrame extends JFrame {

JButton[] buttons = new JButton[16];// 16个按钮

StringBuffer sb = null;//

JTextField text1 = null;// 计算器结果显示框

String no1 = null;

String sign = null;// 表示+-*/符号

String[] s = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-",

"*", "/", "=", "C" };// 面板上的字符

public CalcFrame() {

setTitle("计算器");

setResizable(false);

setBounds(200, 200, 300, 350);

setLayout(null);

sb = new StringBuffer();

text1 = new JTextField();

text1.setBounds(10, 10, 250, 30);// 设置位置

text1.setFont(new Font("Arial", Font.PLAIN, 20));// 设置字体

text1.setForeground(Color.RED);// 设置颜色

add(text1);

for (int i = 0; i < s.length; i++) {

buttons[i] = new JButton(s[i]);

buttons[i].setFont(new Font("Serif", Font.BOLD, 18));

add(buttons[i]);

}// 生成面板上的按钮.

buttons[0].setBounds(10, 50, 50, 40);

buttons[0].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(0);

text1.setText(sb.toString());

}

});

buttons[1].setBounds(70, 50, 50, 40);

buttons[1].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(1);

text1.setText(sb.toString());

}

});

buttons[2].setBounds(130, 50, 50, 40);

buttons[2].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(2);

text1.setText(sb.toString());

}

});

buttons[3].setBounds(190, 50, 50, 40);

buttons[3].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(3);

text1.setText(sb.toString());

}

});

buttons[4].setBounds(10, 100, 50, 40);

buttons[4].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(4);

text1.setText(sb.toString());

}

});

buttons[5].setBounds(70, 100, 50, 40);

buttons[5].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(5);

text1.setText(sb.toString());

}

});

buttons[6].setBounds(130, 100, 50, 40);

buttons[6].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(6);

text1.setText(sb.toString());

}

});

buttons[7].setBounds(190, 100, 50, 40);

buttons[7].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(7);

text1.setText(sb.toString());

}

});

buttons[8].setBounds(10, 150, 50, 40);

buttons[8].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(8);

text1.setText(sb.toString());

}

});

buttons[9].setBounds(70, 150, 50, 40);

buttons[9].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.append(9);

text1.setText(sb.toString());

}

});

buttons[10].setBounds(130, 150, 50, 40);

buttons[10].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sign = "+";

no1 = text1.getText();

sb.delete(0, sb.capacity());

}

});

buttons[11].setBounds(190, 150, 50, 40);

buttons[11].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sign = "-";

no1 = text1.getText();

sb.delete(0, sb.capacity());

}

});

buttons[12].setBounds(10, 200, 50, 40);

buttons[12].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sign = "*";

no1 = text1.getText();

sb.delete(0, sb.capacity());

}

});

buttons[13].setBounds(70, 200, 50, 40);

buttons[13].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sign = "/";

no1 = text1.getText();

sb.delete(0, sb.capacity());

}

});

buttons[14].setForeground(Color.RED);

buttons[14].setBounds(130, 200, 50, 40);

buttons[14].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

int sum = 0;//最终结果

if (sign.equals("+")) {

int no2 = Integer.parseInt(no1);//取得前一个数

int no3 = Integer.parseInt(text1.getText());//取得现在的数

sum = no2 + no3;//累加

text1.setText(String.valueOf(sum));

}

if (sign.equals("-")) {

int no2 = Integer.parseInt(no1);

int no3 = Integer.parseInt(text1.getText());

sum = no2 - no3;

text1.setText(String.valueOf(sum));

}

if (sign.equals("*")) {

int no2 = Integer.parseInt(no1);

int no3 = Integer.parseInt(text1.getText());

sum = no2 * no3;

text1.setText(String.valueOf(sum));

}

if (sign.equals("/")) {

int no2 = Integer.parseInt(no1);

int no3 = Integer.parseInt(text1.getText());

sum = no2 / no3;

text1.setText(String.valueOf(sum));

}

}

});

buttons[15].setBounds(190, 200, 50, 40);

buttons[15].addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

sb.delete(0, sb.capacity());//清除sb的内容

text1.setText("");//结果框设置为空

}

});

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//响应关闭窗口

setVisible(true);//显示窗口

}

}

2.主程序类

package Calc;

public class CalcTest {

public static void main(String[] args) {

CalcFrame f = new CalcFrame();

}

}