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Posted at
21:52 31-05-2010
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* Calculator.java
*
* Created on May 31, 2010, 10:09:58 PM
*/
/**
*
* @author Administrator
*/
public class Calculator extends javax.swing.JFrame {
/** Creates new form Calculator */
public Calculator() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
buttonGroup1 = new javax.swing.ButtonGroup();
jPanel1 = new javax.swing.JPanel();
txtDesktop = new javax.swing.JTextField();
jPanel2 = new javax.swing.JPanel();
jb7 = new javax.swing.JButton();
jb8 = new javax.swing.JButton();
jb9 = new javax.swing.JButton();
jbChia = new javax.swing.JButton();
jPanel3 = new javax.swing.JPanel();
jb4 = new javax.swing.JButton();
jb5 = new javax.swing.JButton();
jb6 = new javax.swing.JButton();
jbNhan = new javax.swing.JButton();
jPanel4 = new javax.swing.JPanel();
jbBang = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
txtDesktop.setText("0");
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(txtDesktop, javax.swing.GroupLayout.PREFERRED_SIZE, 173, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(txtDesktop, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(6, Short.MAX_VALUE))
);
jPanel2.setLayout(new java.awt.GridLayout(1, 0));
jb7.setText("7");
jb7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jb7ActionPerformed(evt);
}
});
jPanel2.add(jb7);
jb8.setText("8");
jb8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jb8ActionPerformed(evt);
}
});
jPanel2.add(jb8);
jb9.setText("9");
jPanel2.add(jb9);
jbChia.setText("/");
buttonGroup1.add(jbChia);
jbChia.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbChiaActionPerformed(evt);
}
});
jPanel2.add(jbChia);
jPanel3.setLayout(new java.awt.GridLayout(1, 0));
jb4.setText("4");
jPanel3.add(jb4);
jb5.setText("5");
jPanel3.add(jb5);
jb6.setText("6");
jPanel3.add(jb6);
jbNhan.setText("*");
buttonGroup1.add(jbNhan);
jbNhan.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbNhanActionPerformed(evt);
}
});
jPanel3.add(jbNhan);
jPanel4.setLayout(new java.awt.GridLayout(1, 0));
jbBang.setText("=");
jbBang.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbBangActionPerformed(evt);
}
});
jPanel4.add(jbBang);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(10, 10, 10)
.addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, 173, Short.MAX_VALUE)
.addGap(10, 10, 10))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, 173, Short.MAX_VALUE)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel4, javax.swing.GroupLayout.DEFAULT_SIZE, 173, Short.MAX_VALUE)
.addContainerGap())
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jb7ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String s = jb7.getText();
String s1 = txtDesktop.getText();
if (s1.indexOf("0") == 0) {
s1 = s1.substring(1);
}
txtDesktop.setText(s1 + s);
}
private void jb8ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String s = jb8.getText();
String s1 = txtDesktop.getText();
if (s1.indexOf("0") == 0) {
s1 = s1.substring(1);
}
txtDesktop.setText(s1 + s);
}
private void jbChiaActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
NumberLast = Integer.parseInt(txtDesktop.getText());
txtDesktop.setText("0");
}
private void jbBangActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jbNhanActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
NumberLast = Integer.parseInt(txtDesktop.getText());
txtDesktop.setText("0");
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Calculator().setVisible(true);
}
});
}
int NumberLast;
int NumberNext;
// Variables declaration - do not modify
private javax.swing.ButtonGroup buttonGroup1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JButton jb4;
private javax.swing.JButton jb5;
private javax.swing.JButton jb6;
private javax.swing.JButton jb7;
private javax.swing.JButton jb8;
private javax.swing.JButton jb9;
private javax.swing.JButton jbBang;
private javax.swing.JButton jbChia;
private javax.swing.JButton jbNhan;
private javax.swing.JTextField txtDesktop;
// End of variables declaration
}Mình đang bí chỗ là khi mình chọn button "*" or "/" thì khi xuống button "=" nó sẽ làm sao biết là mình bắt sự kiên nào ("*" or "/") ???. Ai biết chỉ dùm cái nhá. [:p] [:p] [:p]
