用Awt做个简单的计算器
用AWT编写各个按钮的代码，使得能够进行四则运算。
问题补充：
能不用javaswing里的包
只有awt实现吗
学习中。。。
谢谢
[code="java"]
package app;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class JSQ {
public static void main(String[] args) {
JSQFrame frame = new JSQFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}
}
class JSQFrame extends JFrame {
public JSQFrame() {
JPanel panel = new JPanel();
text1 = new JTextField(35);
text1.setText("");
text1.setEditable(false);
panel.add(text1);
JSQPanel jsqpanel = new JSQPanel(this);
Container contentPane = getContentPane();
contentPane.add(panel, BorderLayout.NORTH);
contentPane.add(jsqpanel);
setSize(400, 200);
setTitle("������");
setResizable(false);
}
JTextField text1;
}
class JSQPanel extends JPanel implements ActionListener {
public JSQPanel(JSQFrame frame) {
this.frame = frame;
setLayout(new GridLayout(5, 5, 10, 5));
buttonBackSpace = new JButton("BS");
buttonCE = new JButton("CE");
buttonC = new JButton("C");
add(buttonBackSpace);
add(new JLabel());
add(buttonCE);
add(new JLabel());
add(buttonC);
for (int i = 7; i <= 9; i++) {
add(button[i] = new JButton("" + i));
}
buttonCHU = new JButton("/");
buttonSQRT = new JButton("sqrt");
add(buttonCHU);
add(buttonSQRT);
for (int i = 4; i <= 6; i++) {
add(button[i] = new JButton("" + i));
}
buttonCHENG = new JButton("*");
buttonPERCENT = new JButton("%");
add(buttonCHENG);
add(buttonPERCENT);
for (int i = 1; i <= 3; i++) {
add(button[i] = new JButton("" + i));
}
buttonJIAN = new JButton("-");
buttonX = new JButton("1/x");
add(buttonJIAN);
add(buttonX);
button[0] = new JButton("0");
buttonFU = new JButton("+/-");
buttonDIAN = new JButton(".");
buttonJIA = new JButton("+");
buttonDENG = new JButton("=");
add(button[0]);
add(buttonFU);
add(buttonDIAN);
add(buttonJIA);
add(buttonDENG);
for (int i = 0; i <= 9; i++) {
button[i].addActionListener(this);
}
buttonBackSpace.addActionListener(this);
buttonCE.addActionListener(this);
buttonC.addActionListener(this);
buttonCHU.addActionListener(this);
buttonSQRT.addActionListener(this);
buttonCHENG.addActionListener(this);
buttonPERCENT.addActionListener(this);
buttonJIAN.addActionListener(this);
buttonX.addActionListener(this);
buttonFU.addActionListener(this);
buttonDIAN.addActionListener(this);
buttonDENG.addActionListener(this);
buttonJIA.addActionListener(this);
String plaf = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
try {
UIManager.setLookAndFeel(plaf);
SwingUtilities.updateComponentTreeUI(this);
} catch (Exception e) {
}
}
public void actionPerformed(ActionEvent event) {
for (int i = 0; i <= 9; i++) {
if (event.getSource() == button[i]) {
frame.text1.setText(frame.text1.getText() + i);
}
}
if (event.getSource() == buttonJIA) {
if (!frame.text1.getText().equals("")) {
DString = "";
FUString = "";
if (YSFString.equals("+")) {
num1 = num1 + Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
}
if (YSFString.equals("")) {
num1 = Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
YSFString = "+";
}
}
}
if (event.getSource() == buttonJIAN) {
if (!frame.text1.getText().equals("")) {
DString = "";
FUString = "";
if (YSFString.equals("-")) {
num1 = num1 - Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
}
if (YSFString.equals("")) {
num1 = Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
YSFString = "-";
}
}
}
if (event.getSource() == buttonCHENG) {
if (!frame.text1.getText().equals("")) {
DString = "";
FUString = "";
if (YSFString.equals("*")) {
num1 = num1 * Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
}
if (YSFString.equals("")) {
num1 = Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
YSFString = "*";
}
}
}
if (event.getSource() == buttonCHU) {
if (!frame.text1.getText().equals("")) {
DString = "";
FUString = "";
if (YSFString.equals("/")) {
num1 = num1 / Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
}
if (YSFString.equals("")) {
num1 = Double.parseDouble(frame.text1.getText());
frame.text1.setText("");
YSFString = "/";
}
}
}
if (event.getSource() == buttonDENG) {
DString = "";
FUString = "";
num2 = Double.parseDouble(frame.text1.getText());
if (YSFString.equals("+")) {
result = num1 + num2;
}
if (YSFString.equals("-")) {
result = num1 - num2;
}
if (YSFString.equals("*")) {
result = num1 * num2;
}
if (YSFString.equals("/")) {
result = num1 / num2;
}
frame.text1.setText("" + result);
YSFString = "";
}
if (event.getSource() == buttonC || event.getSource() == buttonCE) {
frame.text1.setText("");
}
if (event.getSource() == buttonDIAN) {
if ("".equals(DString)) {
frame.text1.setText(frame.text1.getText() + ".");
}
DString = ".";
}
if (event.getSource() == buttonFU) {
if ("".equals(FUString)) {
frame.text1.setText(frame.text1.getText() + "-");
}
FUString = "-";
}
if (event.getSource() == buttonSQRT) {
double d = 0;
if (!frame.text1.getText().equals("")) {
d = Double.parseDouble(frame.text1.getText());
}
frame.text1.setText("" + Math.sqrt(d));
}
if (event.getSource() == buttonX) {
double d = 0;
if (!frame.text1.getText().equals("")) {
d = Double.parseDouble(frame.text1.getText());
d = 1 / d;
frame.text1.setText("" + d);
}
}
if (event.getSource() == buttonPERCENT) {
if (!frame.text1.getText().equals("")) {
double d = 0;
d = Double.parseDouble(frame.text1.getText()) * 100;
frame.text1.setText("" + d);
}
}
if (event.getSource() == buttonBackSpace) {
if (!frame.text1.getText().equals("")) {
int length = 0;
String string = "";
length = (frame.text1.getText()).length();
System.out.println(length);
string = frame.text1.getText();
String str = string.substring(0, length - 1);
frame.text1.setText(str);
}
}
}
JButton button[] = new JButton[10];
JButton buttonBackSpace, buttonCE, buttonC, buttonCHU, buttonSQRT, buttonCHENG,
buttonPERCENT, buttonJIAN, buttonX, buttonFU, buttonDIAN, buttonDENG, buttonJIA;
JSQFrame frame;
double num1 = 0, num2 = 0, result = 0;
String YSFString = "", DString = "", FUString = "";
}
[/code]
以前上学时候写的，代码写的比较烂，可能会有bug
setTitle("������");处的代码应该是setTitle("计算器");怎么复制出来成乱码了
算法已经写好了，你自己把控件从swing换到awt不就OK了
有swing不用,为啥非用AWT呢?
匪夷所思!