import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;public class J_Table extends JFrame{
public static final int WIDTH = 400;
public static final int HEIGHT = 250;
public static final String checkedLabel="";
private JTextField countertext;
private JButton counterbutton;
JTextField boardout;
String s;
public J_Table()
{
super("计算器");
setSize(WIDTH, HEIGHT);
Container c =getContentPane();
c.setLayout(new GridLayout());
//建立容纳操作的面板
JPanel buttonPanel = new JPanel();
int i;
for(i=0;i<10;i++)
{
s=""+i;
counterbutton=new JButton(s);
buttonPanel.add(counterbutton);
c.add(buttonPanel);
}
counterbutton=new JButton("=");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton("c");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" +");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" -");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" * ");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" /");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
JPanel textPanel = new JPanel();
//新建文本区
countertext = new JTextField(checkedLabel,10);
textPanel.add(countertext); c.add(textPanel);
//用匿名类来实现按钮动作
JButton n = new JButton();
n.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
char a ='0';
String v =String.valueOf(a);
if(a!='='&&a!='c')
{
JTextField boardout=(JTextField)e.getSource();
countertext.setText(v);
}
else
{
}
}
}
);
}}
我做好的计算器界面,想单击按钮,可以将值显示在文本框中,请大家指教!
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;public class J_Table extends JFrame{
public static final int WIDTH = 400;
public static final int HEIGHT = 250;
public static final String checkedLabel="";
private JTextField countertext;
private JButton counterbutton;
JTextField boardout;
String s;
public J_Table()
{
super("计算器");
setSize(WIDTH, HEIGHT);
Container c =getContentPane();
c.setLayout(new GridLayout());
//建立容纳操作的面板
JPanel buttonPanel = new JPanel();
int i;
for(i=0;i<10;i++)
{
s=""+i;
counterbutton=new JButton(s);
buttonPanel.add(counterbutton);
c.add(buttonPanel);
}
counterbutton=new JButton("=");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton("c");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" +");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" -");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" * ");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
counterbutton=new JButton(" /");
buttonPanel.add(counterbutton);
c.add(buttonPanel);
JPanel textPanel = new JPanel();
//新建文本区
countertext = new JTextField(checkedLabel,10);
textPanel.add(countertext); c.add(textPanel);
//用匿名类来实现按钮动作
JButton n = new JButton();
n.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
char a ='0';
String v =String.valueOf(a);
if(a!='='&&a!='c')
{
JTextField boardout=(JTextField)e.getSource();
countertext.setText(v);
}
else
{
}
}
}
);
}}
我做好的计算器界面,想单击按钮,可以将值显示在文本框中,请大家指教!
解决方案 »
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就是下面这段
//用匿名类来实现按钮动作
JButton n = new JButton();
n.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
char a ='0';
String v =String.valueOf(a);
if(a!='='&&a!='c')
{
JTextField boardout=(JTextField)e.getSource();
countertext.setText(v);
}
else
{
} } }
); } }