importjava.awt.EventQueue;importjavax.swing.JFrame;importjavax.swing.JButton;importjavax.swing.JTextField;importjava.awt.event.ActionListener;importjava.awt.event.ActionEvent;/*** GUI计算器
*@authorAdministrator
**/
public classCalculater {static float sum =0f;privateJFrame frame;privateJTextField textField;/*** Launch the application.*/
public static voidmain(String[] args) {
EventQueue.invokeLater(newRunnable() {public voidrun() {try{
Calculater window= newCalculater();
window.frame.setVisible(true);
}catch(Exception e) {
e.printStackTrace();
}
}
});
}/*** Create the application.*/
publicCalculater() {
initialize();
}/*** Initialize the contents of the frame.*/
private voidinitialize() {
frame= newJFrame();
frame.setBounds(100, 100, 730, 619);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
JButton btnNewButton= new JButton("1");
btnNewButton.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent arg0) {
textField.setText(textField.getText()+1);
}
});
btnNewButton.setBounds(70, 265, 50, 26);
frame.getContentPane().add(btnNewButton);
JButton button= new JButton("2");
button.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+2);
}
});
button.setBounds(144, 265, 50, 26);
frame.getContentPane().add(button);
JButton button_1= new JButton("3");
button_1.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+3);
}
});
button_1.setBounds(221, 265, 50, 26);
frame.getContentPane().add(button_1);
JButton button_2= new JButton("4");
button_2.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+4);
}
});
button_2.setBounds(70, 304, 50, 26);
frame.getContentPane().add(button_2);
JButton button_3= new JButton("5");
button_3.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+5);
}
});
button_3.setBounds(144, 304, 50, 26);
frame.getContentPane().add(button_3);
JButton button_4= new JButton("6");
button_4.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+6);
}
});
button_4.setBounds(221, 304, 50, 26);
frame.getContentPane().add(button_4);
JButton button_5= new JButton("7");
button_5.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+7);
}
});
button_5.setBounds(70, 339, 50, 26);
frame.getContentPane().add(button_5);
JButton button_6= new JButton("8");
button_6.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+8);
}
});
button_6.setBounds(144, 339, 50, 26);
frame.getContentPane().add(button_6);
JButton button_7= new JButton("9");
button_7.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+9);
}
});
button_7.setBounds(221, 339, 50, 26);
frame.getContentPane().add(button_7);//加法///
JButton button_8 = new JButton("+");
button_8.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+" + ");//加
String str =textField.getText();
String [] stringArr= str.split((" "));if(stringArr.length == 2) {float i = Float.valueOf(stringArr[0]);
sum=i;
}else if(stringArr[stringArr.length-3].equals("+")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum+i;
}else if(stringArr[stringArr.length-3].equals("-")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum-i;
}else if(stringArr[stringArr.length-3].equals("*")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum*i;
}else if(stringArr[stringArr.length-3].equals("/")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum/i;
}
}
});
button_8.setBounds(293, 265, 50, 26);
frame.getContentPane().add(button_8);//减法// JButton button_9 = new JButton("-");
button_9.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+" - ");//减
String str =textField.getText();
String [] stringArr= str.split((" "));if(stringArr.length == 2) {float i = Float.valueOf(stringArr[0]);
sum=i;
}else if(stringArr[stringArr.length-3].equals("+")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum+i;
}else if(stringArr[stringArr.length-3].equals("-")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum-i;
}else if(stringArr[stringArr.length-3].equals("*")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum*i;
}else if(stringArr[stringArr.length-3].equals("/")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum/i;
}
}
});
button_9.setBounds(293, 304, 50, 26);
frame.getContentPane().add(button_9);//乘法// JButton button_10 = new JButton("*");
button_10.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+" * ");
String str=textField.getText();
String [] stringArr= str.split((" "));if(stringArr.length == 2) {float i = Float.valueOf(stringArr[0]);
sum=i;
}else if(stringArr[stringArr.length-3].equals("+")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum+i;
}else if(stringArr[stringArr.length-3].equals("-")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum-i;
}else if(stringArr[stringArr.length-3].equals("*")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum*i;
}else if(stringArr[stringArr.length-3].equals("/")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum/i;
}
}
});
button_10.setBounds(293, 339, 50, 26);
frame.getContentPane().add(button_10);
JButton button_11= new JButton("0");
button_11.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+0);
}
});
button_11.setBounds(144, 380, 50, 26);
frame.getContentPane().add(button_11);//除法// JButton button_12 = new JButton("/");
button_12.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+" / ");
String str=textField.getText();
String [] stringArr= str.split((" "));if(stringArr.length == 2) {float i = Float.valueOf(stringArr[0]);
sum=i;
}else if(stringArr[stringArr.length-3].equals("+")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum+i;
}else if(stringArr[stringArr.length-3].equals("-")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum-i;
}else if(stringArr[stringArr.length-3].equals("*")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum*i;
}else if(stringArr[stringArr.length-3].equals("/")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum/i;
}
}
});
button_12.setBounds(293, 380, 50, 26);
frame.getContentPane().add(button_12);
JButton button_13= new JButton("=");
button_13.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText(textField.getText()+" = ");
String str=textField.getText();
String [] stringArr= str.split((" "));if(stringArr.length == 2) {float i = Float.valueOf(stringArr[0]);
sum=i;
textField.setText(textField.getText()+sum);
}else if(stringArr[stringArr.length-3].equals("+")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum+i;
textField.setText(textField.getText()+sum);
}else if(stringArr[stringArr.length-3].equals("-")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum-i;
textField.setText(textField.getText()+sum);
}else if(stringArr[stringArr.length-3].equals("*")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum*i;
textField.setText(textField.getText()+sum);
}else if(stringArr[stringArr.length-3].equals("/")) {float i = Float.valueOf(stringArr[stringArr.length-2]);
sum= sum/i;
textField.setText(textField.getText()+sum);
}
}
});
button_13.setBounds(364, 265, 50, 26);
frame.getContentPane().add(button_13);
textField= newJTextField();
textField.setBounds(70, 148, 344, 79);
frame.getContentPane().add(textField);
textField.setColumns(10);
JButton btnC= new JButton("C");
btnC.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent e) {
textField.setText("");
sum= 0;
}
});
btnC.setBounds(364, 304, 50, 26);
frame.getContentPane().add(btnC);
JButton button_14= new JButton(".");
button_14.addActionListener(newActionListener() {public voidactionPerformed(ActionEvent arg0) {
textField.setText(textField.getText()+".");
}
});
button_14.setBounds(364, 341, 50, 26);
frame.getContentPane().add(button_14);
}
}