这是我编的代码但不能进行加法运算,谁能帮帮我,到底哪里错了?谢谢大家!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class J_Text extends JFrame{
private JTextField[]m_textField={
new JTextField("",5),new JTextField("",5),new JTextField("",5)};
private JButton[]m_button={new JButton("+"),new JButton("=")};
double x,y,z=0;
public J_Text(){
super("Sum");
Container container =getContentPane();
container.setLayout(new FlowLayout());
//m_textField[0].setEditable(false);
//m_textField[1].setEditable(false);
container.add(m_textField[0]);
container.add(m_button[0]);
container.add(m_textField[1]);
container.add(m_button[1]);
container.add(m_textField[2]);
J_Handler handler=new J_Handler();//进行监听
m_textField[0].addActionListener(handler);
m_textField[1].addActionListener(handler);
m_textField[2].addActionListener(handler);
setSize(300,100);
setVisible(true);
}
private class J_Handler implements ActionListener{ public void actionPerformed(ActionEvent event){
s=s+ event.getActionCommand();
x=Double.parseDouble(m_textField[0].getText());
y=Double.parseDouble(m_textField[1].getText());
z=x+y;
if(event.getSource()==m_button[1]){
m_textField[2].setText(""+(z));
}
}
}
public static void main(String []args){
J_Text application=new J_Text();
application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class J_Text extends JFrame{
private JTextField[]m_textField={
new JTextField("",5),new JTextField("",5),new JTextField("",5)};
private JButton[]m_button={new JButton("+"),new JButton("=")};
double x,y,z=0;
public J_Text(){
super("Sum");
Container container =getContentPane();
container.setLayout(new FlowLayout());
//m_textField[0].setEditable(false);
//m_textField[1].setEditable(false);
container.add(m_textField[0]);
container.add(m_button[0]);
container.add(m_textField[1]);
container.add(m_button[1]);
container.add(m_textField[2]);
J_Handler handler=new J_Handler();//进行监听
m_textField[0].addActionListener(handler);
m_textField[1].addActionListener(handler);
m_textField[2].addActionListener(handler);
setSize(300,100);
setVisible(true);
}
private class J_Handler implements ActionListener{ public void actionPerformed(ActionEvent event){
s=s+ event.getActionCommand();
x=Double.parseDouble(m_textField[0].getText());
y=Double.parseDouble(m_textField[1].getText());
z=x+y;
if(event.getSource()==m_button[1]){
m_textField[2].setText(""+(z));
}
}
}
public static void main(String []args){
J_Text application=new J_Text();
application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
private class J_Handler implements ActionListener{ public void actionPerformed(ActionEvent event){
s=s+ event.getActionCommand();
x=Double.parseDouble(m_textField[0].getText());
y=Double.parseDouble(m_textField[1].getText());
z=x+y;
if(event.getSource()==m_button[1]){
m_textField[2].setText(""+(z));
}
}
}
这里你解释下撒
这个语句好象有问题呀
m_textField[2].setText(""+(z));
这里错了!!
if (event.getActionCommand().equals("m_button[1]"))
m_textField[2].setText(z);