import javax.swing.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
/**
*
* @author fubin
* 标准计算器
* Download:http://www.codefans.net
*/
public class buatcalculator extends JFrame implements ActionListener{ JPanel txtpanel,btnpanel,southpanel;
JTextField txtinput;
JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdes,kalibtn,bagibtn,tambahbtn,kurangbtn,clearbtn,equalbtn,aboutbtn;
GridLayout gl;
double simpan,hasil;
String operasi; public buatcalculator()
{
super("Calculator Cabe");
txtpanel=new JPanel();
btnpanel=new JPanel();
southpanel=new JPanel();
txtinput=new JTextField(20);
txtinput.setEditable(false);
txtinput.setHorizontalAlignment(JTextField.RIGHT);
txtinput.setText("");
b1=new JButton("1");
b2=new JButton("2");
b3=new JButton("3");
b4=new JButton("4");
b5=new JButton("5");
b6=new JButton("6");
b7=new JButton("7");
b8=new JButton("8");
b9=new JButton("9");
b0=new JButton("0");
bdes=new JButton(".");
kalibtn=new JButton("x");
kalibtn.setFont(new Font("Gothic",Font.BOLD,20));
kalibtn.setBackground(Color.black);
kalibtn.setForeground(Color.blue);
bagibtn=new JButton(":");
bagibtn.setFont(new Font("Gothic",Font.BOLD,20));
bagibtn.setBackground(Color.black);
bagibtn.setForeground(Color.blue);
tambahbtn=new JButton("+");
tambahbtn.setFont(new Font("Gothic",Font.BOLD,20));
tambahbtn.setBackground(Color.black);
tambahbtn.setForeground(Color.blue);
kurangbtn=new JButton("-");
kurangbtn.setFont(new Font("Gothic",Font.BOLD,20));
kurangbtn.setBackground(Color.black);
kurangbtn.setForeground(Color.blue);
aboutbtn=new JButton("About");
aboutbtn.setFont(new Font("Arial",Font.ITALIC,12));
aboutbtn.setBackground(Color.black);
aboutbtn.setForeground(Color.red); aboutbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent argh)
{
btnOKActionPerformed();
}
}); clearbtn=new JButton("C");
clearbtn.setFont(new Font("Arial",Font.ITALIC,12));
clearbtn.setBackground(Color.black);
clearbtn.setForeground(Color.red);
clearbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent argh)
{
btnCancelActionPerformed();
}
}); equalbtn=new JButton("=");
equalbtn.setFont(new Font("Arial",Font.ITALIC,20));
equalbtn.setBackground(Color.black);
equalbtn.setForeground(Color.blue); //putting event to the button
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
b0.addActionListener(this);
bdes.addActionListener(this);
kalibtn.addActionListener(this);
bagibtn.addActionListener(this);
tambahbtn.addActionListener(this);
kurangbtn.addActionListener(this);
equalbtn.addActionListener(this);
getContentPane().add(txtpanel,BorderLayout.NORTH); txtpanel.add(txtinput); gl=new GridLayout(4,5,5,5);
btnpanel.setLayout(gl);
getContentPane().add(btnpanel); btnpanel.add(b7);
btnpanel.add(b8);
btnpanel.add(b9);
btnpanel.add(kalibtn);
btnpanel.add(b4);
btnpanel.add(b5);
btnpanel.add(b6);
btnpanel.add(bagibtn);
btnpanel.add(b1);
btnpanel.add(b2);
btnpanel.add(b3);
btnpanel.add(tambahbtn);
btnpanel.add(b0);
btnpanel.add(bdes);
btnpanel.add(equalbtn);
btnpanel.add(kurangbtn); getContentPane().add(southpanel,BorderLayout.SOUTH);
southpanel.add(clearbtn);
southpanel.add(aboutbtn); setSize(250,300);
setVisible(true);
setLocation(300,200);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public void btnOKActionPerformed() {
JOptionPane.showMessageDialog(null,"标准计算器"+"\nCreated By Fubin ([email protected]) Make in china, 海南"+"\n这是我做过所有计算器中最简洁,最实用的一个了!","About",JOptionPane.INFORMATION_MESSAGE);
} public void btnCancelActionPerformed() {
txtinput.setText("");
}
public void actionPerformed(ActionEvent e)
{
try
{
Object objkcal=e.getSource();
if(objkcal==b1)
txtinput.setText(txtinput.getText()+"1");
else
if(objkcal==b2)
txtinput.setText(txtinput.getText()+"2");
else
if(objkcal==b3)
txtinput.setText(txtinput.getText()+"3");
else
if(objkcal==b4)
txtinput.setText(txtinput.getText()+"4");
else
if(objkcal==b5)
txtinput.setText(txtinput.getText()+"5");
else
if(objkcal==b6)
txtinput.setText(txtinput.getText()+"6");
else
if(objkcal==b7)
txtinput.setText(txtinput.getText()+"7");
else
if(objkcal==b8)
txtinput.setText(txtinput.getText()+"8");
else
if(objkcal==b9)
txtinput.setText(txtinput.getText()+"9");
else
if(objkcal==b0)
txtinput.setText(txtinput.getText()+"0");
else
if(objkcal==bdes)
txtinput.setText(txtinput.getText()+".");
else
if(objkcal==tambahbtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="plus";
txtinput.setText("");
}
else
if(objkcal==kurangbtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="minus";
txtinput.setText("");
}
else
if(objkcal==bagibtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="bagi";
txtinput.setText("");
}
else
if(objkcal==kalibtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="kali";
txtinput.setText("");
}
else
if(objkcal==equalbtn)
{
//catching the "plus" operation
if(operasi=="plus")
{
hasil=simpan+Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "minus" operation
if(operasi=="minus")
{
hasil=simpan-Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
if(txtinput.equals(txtinput.getText())&&objkcal==kurangbtn)
{
hasil=simpan-Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "bagi" operation
if(operasi=="bagi")
{
hasil=simpan/Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "kali" operation
if(operasi=="kali")
{
hasil=simpan*Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
}
}
catch(Exception ouch)
{
JOptionPane.showMessageDialog(null,"错误输入","error",JOptionPane.ERROR_MESSAGE);
} }
public static void main(String args[])
{ try {
//使用显示风格
UIManager.setLookAndFeel ("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); } catch(Exception e)
{} new buatcalculator(); }}
import java.io.*;
import java.awt.*;
import java.awt.event.*;
/**
*
* @author fubin
* 标准计算器
* Download:http://www.codefans.net
*/
public class buatcalculator extends JFrame implements ActionListener{ JPanel txtpanel,btnpanel,southpanel;
JTextField txtinput;
JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdes,kalibtn,bagibtn,tambahbtn,kurangbtn,clearbtn,equalbtn,aboutbtn;
GridLayout gl;
double simpan,hasil;
String operasi; public buatcalculator()
{
super("Calculator Cabe");
txtpanel=new JPanel();
btnpanel=new JPanel();
southpanel=new JPanel();
txtinput=new JTextField(20);
txtinput.setEditable(false);
txtinput.setHorizontalAlignment(JTextField.RIGHT);
txtinput.setText("");
b1=new JButton("1");
b2=new JButton("2");
b3=new JButton("3");
b4=new JButton("4");
b5=new JButton("5");
b6=new JButton("6");
b7=new JButton("7");
b8=new JButton("8");
b9=new JButton("9");
b0=new JButton("0");
bdes=new JButton(".");
kalibtn=new JButton("x");
kalibtn.setFont(new Font("Gothic",Font.BOLD,20));
kalibtn.setBackground(Color.black);
kalibtn.setForeground(Color.blue);
bagibtn=new JButton(":");
bagibtn.setFont(new Font("Gothic",Font.BOLD,20));
bagibtn.setBackground(Color.black);
bagibtn.setForeground(Color.blue);
tambahbtn=new JButton("+");
tambahbtn.setFont(new Font("Gothic",Font.BOLD,20));
tambahbtn.setBackground(Color.black);
tambahbtn.setForeground(Color.blue);
kurangbtn=new JButton("-");
kurangbtn.setFont(new Font("Gothic",Font.BOLD,20));
kurangbtn.setBackground(Color.black);
kurangbtn.setForeground(Color.blue);
aboutbtn=new JButton("About");
aboutbtn.setFont(new Font("Arial",Font.ITALIC,12));
aboutbtn.setBackground(Color.black);
aboutbtn.setForeground(Color.red); aboutbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent argh)
{
btnOKActionPerformed();
}
}); clearbtn=new JButton("C");
clearbtn.setFont(new Font("Arial",Font.ITALIC,12));
clearbtn.setBackground(Color.black);
clearbtn.setForeground(Color.red);
clearbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent argh)
{
btnCancelActionPerformed();
}
}); equalbtn=new JButton("=");
equalbtn.setFont(new Font("Arial",Font.ITALIC,20));
equalbtn.setBackground(Color.black);
equalbtn.setForeground(Color.blue); //putting event to the button
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
b0.addActionListener(this);
bdes.addActionListener(this);
kalibtn.addActionListener(this);
bagibtn.addActionListener(this);
tambahbtn.addActionListener(this);
kurangbtn.addActionListener(this);
equalbtn.addActionListener(this);
getContentPane().add(txtpanel,BorderLayout.NORTH); txtpanel.add(txtinput); gl=new GridLayout(4,5,5,5);
btnpanel.setLayout(gl);
getContentPane().add(btnpanel); btnpanel.add(b7);
btnpanel.add(b8);
btnpanel.add(b9);
btnpanel.add(kalibtn);
btnpanel.add(b4);
btnpanel.add(b5);
btnpanel.add(b6);
btnpanel.add(bagibtn);
btnpanel.add(b1);
btnpanel.add(b2);
btnpanel.add(b3);
btnpanel.add(tambahbtn);
btnpanel.add(b0);
btnpanel.add(bdes);
btnpanel.add(equalbtn);
btnpanel.add(kurangbtn); getContentPane().add(southpanel,BorderLayout.SOUTH);
southpanel.add(clearbtn);
southpanel.add(aboutbtn); setSize(250,300);
setVisible(true);
setLocation(300,200);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public void btnOKActionPerformed() {
JOptionPane.showMessageDialog(null,"标准计算器"+"\nCreated By Fubin ([email protected]) Make in china, 海南"+"\n这是我做过所有计算器中最简洁,最实用的一个了!","About",JOptionPane.INFORMATION_MESSAGE);
} public void btnCancelActionPerformed() {
txtinput.setText("");
}
public void actionPerformed(ActionEvent e)
{
try
{
Object objkcal=e.getSource();
if(objkcal==b1)
txtinput.setText(txtinput.getText()+"1");
else
if(objkcal==b2)
txtinput.setText(txtinput.getText()+"2");
else
if(objkcal==b3)
txtinput.setText(txtinput.getText()+"3");
else
if(objkcal==b4)
txtinput.setText(txtinput.getText()+"4");
else
if(objkcal==b5)
txtinput.setText(txtinput.getText()+"5");
else
if(objkcal==b6)
txtinput.setText(txtinput.getText()+"6");
else
if(objkcal==b7)
txtinput.setText(txtinput.getText()+"7");
else
if(objkcal==b8)
txtinput.setText(txtinput.getText()+"8");
else
if(objkcal==b9)
txtinput.setText(txtinput.getText()+"9");
else
if(objkcal==b0)
txtinput.setText(txtinput.getText()+"0");
else
if(objkcal==bdes)
txtinput.setText(txtinput.getText()+".");
else
if(objkcal==tambahbtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="plus";
txtinput.setText("");
}
else
if(objkcal==kurangbtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="minus";
txtinput.setText("");
}
else
if(objkcal==bagibtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="bagi";
txtinput.setText("");
}
else
if(objkcal==kalibtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="kali";
txtinput.setText("");
}
else
if(objkcal==equalbtn)
{
//catching the "plus" operation
if(operasi=="plus")
{
hasil=simpan+Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "minus" operation
if(operasi=="minus")
{
hasil=simpan-Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
if(txtinput.equals(txtinput.getText())&&objkcal==kurangbtn)
{
hasil=simpan-Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "bagi" operation
if(operasi=="bagi")
{
hasil=simpan/Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "kali" operation
if(operasi=="kali")
{
hasil=simpan*Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
}
}
catch(Exception ouch)
{
JOptionPane.showMessageDialog(null,"错误输入","error",JOptionPane.ERROR_MESSAGE);
} }
public static void main(String args[])
{ try {
//使用显示风格
UIManager.setLookAndFeel ("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); } catch(Exception e)
{} new buatcalculator(); }}
1、将代码进行良好的格式化,以方便阅读。
2、在发帖文本框的上方单击“#”按钮,选择 Java
3、将代码粘贴到【code=Java】和【/code】之间。发出来的帖子就会是下面的效果:public class Hello { // 程序入口
public static void main(String[] args) {
System.out.println("Hello!");
}
}
import javax.swing.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
/**
*
* @author fubin
* 标准计算器
* Download:http://www.codefans.net
*/
public class buatcalculator extends JFrame implements ActionListener { JPanel txtpanel,btnpanel,southpanel;
JTextField txtinput;
JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdes,kalibtn,bagibtn,tambahbtn,kurangbtn,clearbtn,equalbtn,aboutbtn;
GridLayout gl;
double simpan,hasil;
String operasi; public buatcalculator()
{
super("Calculator Cabe");
txtpanel=new JPanel();
btnpanel=new JPanel();
southpanel=new JPanel();
txtinput=new JTextField(20);
txtinput.setEditable(false);
txtinput.setHorizontalAlignment(JTextField.RIGHT);
txtinput.setText("");
b1=new JButton("1");
b2=new JButton("2");
b3=new JButton("3");
b4=new JButton("4");
b5=new JButton("5");
b6=new JButton("6");
b7=new JButton("7");
b8=new JButton("8");
b9=new JButton("9");
b0=new JButton("0");
bdes=new JButton(".");
kalibtn=new JButton("x");
kalibtn.setFont(new Font("Gothic",Font.BOLD,20));
kalibtn.setBackground(Color.black);
kalibtn.setForeground(Color.blue);
bagibtn=new JButton(":");
bagibtn.setFont(new Font("Gothic",Font.BOLD,20));
bagibtn.setBackground(Color.black);
bagibtn.setForeground(Color.blue);
tambahbtn=new JButton("+");
tambahbtn.setFont(new Font("Gothic",Font.BOLD,20));
tambahbtn.setBackground(Color.black);
tambahbtn.setForeground(Color.blue);
kurangbtn=new JButton("-");
kurangbtn.setFont(new Font("Gothic",Font.BOLD,20));
kurangbtn.setBackground(Color.black);
kurangbtn.setForeground(Color.blue);
aboutbtn=new JButton("About");
aboutbtn.setFont(new Font("Arial",Font.ITALIC,12));
aboutbtn.setBackground(Color.black);
aboutbtn.setForeground(Color.red); aboutbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent argh)
{
btnOKActionPerformed();
}
}); clearbtn=new JButton("C");
clearbtn.setFont(new Font("Arial",Font.ITALIC,12));
clearbtn.setBackground(Color.black);
clearbtn.setForeground(Color.red);
clearbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent argh)
{
btnCancelActionPerformed();
}
}); equalbtn=new JButton("=");
equalbtn.setFont(new Font("Arial",Font.ITALIC,20));
equalbtn.setBackground(Color.black);
equalbtn.setForeground(Color.blue); //putting event to the button
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
b0.addActionListener(this);
bdes.addActionListener(this);
kalibtn.addActionListener(this);
bagibtn.addActionListener(this);
tambahbtn.addActionListener(this);
kurangbtn.addActionListener(this);
equalbtn.addActionListener(this);
getContentPane().add(txtpanel,BorderLayout.NORTH); txtpanel.add(txtinput); gl=new GridLayout(4,5,5,5);
btnpanel.setLayout(gl);
getContentPane().add(btnpanel); btnpanel.add(b7);
btnpanel.add(b8);
btnpanel.add(b9);
btnpanel.add(kalibtn);
btnpanel.add(b4);
btnpanel.add(b5);
btnpanel.add(b6);
btnpanel.add(bagibtn);
btnpanel.add(b1);
btnpanel.add(b2);
btnpanel.add(b3);
btnpanel.add(tambahbtn);
btnpanel.add(b0);
btnpanel.add(bdes);
btnpanel.add(equalbtn);
btnpanel.add(kurangbtn); getContentPane().add(southpanel,BorderLayout.SOUTH);
southpanel.add(clearbtn);
southpanel.add(aboutbtn); setSize(250,300);
setVisible(true);
setLocation(300,200);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public void btnOKActionPerformed() {
JOptionPane.showMessageDialog(null,"标准计算器"+"\nCreated By Fubin ([email protected]) Make in china, 海南"+"\n这是我做过所有计算器中最简洁,最实用的一个了!","About",JOptionPane.INFORMATION_MESSAGE);
} public void btnCancelActionPerformed() {
txtinput.setText("");
}
public void actionPerformed(ActionEvent e)
{
try
{
Object objkcal=e.getSource();
if(objkcal==b1)
txtinput.setText(txtinput.getText()+"1");
else
if(objkcal==b2)
txtinput.setText(txtinput.getText()+"2");
else
if(objkcal==b3)
txtinput.setText(txtinput.getText()+"3");
else
if(objkcal==b4)
txtinput.setText(txtinput.getText()+"4");
else
if(objkcal==b5)
txtinput.setText(txtinput.getText()+"5");
else
if(objkcal==b6)
txtinput.setText(txtinput.getText()+"6");
else
if(objkcal==b7)
txtinput.setText(txtinput.getText()+"7");
else
if(objkcal==b8)
txtinput.setText(txtinput.getText()+"8");
else
if(objkcal==b9)
txtinput.setText(txtinput.getText()+"9");
else
if(objkcal==b0)
txtinput.setText(txtinput.getText()+"0");
else
if(objkcal==bdes)
txtinput.setText(txtinput.getText()+".");
else
if(objkcal==tambahbtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="plus";
txtinput.setText("");
}
else
if(objkcal==kurangbtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="minus";
txtinput.setText("");
}
else
if(objkcal==bagibtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="bagi";
txtinput.setText("");
}
else
if(objkcal==kalibtn)
{
//save the first number to the var simpan
simpan=Double.parseDouble(txtinput.getText());
operasi="kali";
txtinput.setText("");
}
else
if(objkcal==equalbtn)
{
//catching the "plus" operation
if(operasi=="plus")
{
hasil=simpan+Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "minus" operation
if(operasi=="minus")
{
hasil=simpan-Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
if(txtinput.equals(txtinput.getText())&&objkcal==kurangbtn)
{
hasil=simpan-Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "bagi" operation
if(operasi=="bagi")
{
hasil=simpan/Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
else
//catching the "kali" operation
if(operasi=="kali")
{
hasil=simpan*Double.parseDouble(txtinput.getText());
txtinput.setText(Double.toString(hasil));
}
}
}
catch(Exception ouch)
{
JOptionPane.showMessageDialog(null,"错误输入","error",JOptionPane.ERROR_MESSAGE);
} }
public static void main(String args[])
{ try {
//使用显示风格
UIManager.setLookAndFeel ("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); } catch(Exception e)
{} new buatcalculator(); } }