程序运行效果
直接上代码
主类:
/*
* 程序主类
* 制作时间:2019/6/21
*/
package 技能竞赛4;
import java.awt.ComponentOrientation;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.*;
public class calcuator extends JFrame{
//判断输入次数
public static int k=0;
//程序主函数
public static void main(String[] args){
new calcuator();
}
//程序内容函数
public calcuator(){
//窗口容器
JPanel b=new JPanel();
b.setLayout(null);
add(b);
//输入文本域
JTextArea km=new JTextArea();
km.setBounds(5, 5, 680, 50);
km.setFont(new Font("微软雅黑",Font.BOLD,30));
b.add(km);
/*
* 下面均属按钮
*/
JButton button1=new JButton("1");
button1.setFont(new Font("微软雅黑",Font.BOLD,15));
button1.setBounds(5, 70, 140, 40);
b.add(button1);
button1.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("1");
}
});
JButton button2=new JButton("2");
button2.setFont(new Font("微软雅黑",Font.BOLD,15));
button2.setBounds(185, 70, 140, 40);
b.add(button2);
button2.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("2");
}
});
JButton button3=new JButton("3");
button3.setFont(new Font("微软雅黑",Font.BOLD,15));
button3.setBounds(365, 70, 140, 40);
b.add(button3);
button3.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("3");
}
});
JButton buttona=new JButton("+");
buttona.setFont(new Font("微软雅黑",Font.BOLD,15));
buttona.setBounds(545, 70, 140, 40);
b.add(buttona);
buttona.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("+");
}
});
JButton button4=new JButton("4");
button4.setFont(new Font("微软雅黑",Font.BOLD,15));
button4.setBounds(5, 130, 140, 40);
b.add(button4);
button4.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("4");
}
});
JButton button5=new JButton("5");
button5.setFont(new Font("微软雅黑",Font.BOLD,15));
button5.setBounds(185, 130, 140, 40);
b.add(button5);
button5.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("5");
}
});
JButton button6=new JButton("6");
button6.setFont(new Font("微软雅黑",Font.BOLD,15));
button6.setBounds(365, 130, 140, 40);
b.add(button6);
button6.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("6");
}
});
JButton buttonb=new JButton("-");
buttonb.setFont(new Font("微软雅黑",Font.BOLD,15));
buttonb.setBounds(545, 130, 140, 40);
b.add(buttonb);
buttonb.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("-");
}
});
JButton button7=new JButton("7");
button7.setFont(new Font("微软雅黑",Font.BOLD,15));
button7.setBounds(5, 190, 140, 40);
b.add(button7);
button7.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("7");
}
});
JButton button8=new JButton("8");
button8.setFont(new Font("微软雅黑",Font.BOLD,15));
button8.setBounds(185, 190, 140, 40);
b.add(button8);
button8.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("8");
}
});
JButton button9=new JButton("9");
button9.setFont(new Font("微软雅黑",Font.BOLD,15));
button9.setBounds(365, 190, 140, 40);
b.add(button9);
button9.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("9");
}
});
JButton buttonc=new JButton("*");
buttonc.setFont(new Font("微软雅黑",Font.BOLD,15));
buttonc.setBounds(545, 190, 140, 40);
b.add(buttonc);
buttonc.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("*");
}
});
JButton button0=new JButton("0");
button0.setFont(new Font("微软雅黑",Font.BOLD,15));
button0.setBounds(5, 250, 140, 40);
b.add(button0);
button0.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("0");
}
});
JButton buttond=new JButton("(");
buttond.setFont(new Font("微软雅黑",Font.BOLD,15));
buttond.setBounds(185, 250, 140, 40);
b.add(buttond);
buttond.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("(");
}
});
JButton buttone=new JButton(")");
buttone.setFont(new Font("微软雅黑",Font.BOLD,15));
buttone.setBounds(365, 250, 140, 40);
b.add(buttone);
buttone.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append(")");
}
});
JButton buttonf=new JButton("/");
buttonf.setFont(new Font("微软雅黑",Font.BOLD,15));
buttonf.setBounds(545, 250, 140, 40);
b.add(buttonf);
buttonf.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
km.append("/");
}
});
JButton buttong=new JButton("计算结果");
buttong.setFont(new Font("微软雅黑",Font.BOLD,15));
buttong.setBounds(480, 310, 200, 40);
b.add(buttong);
buttong.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
CalerReturn.content=km.getText();
CalerReturn a=new CalerReturn();
Object u=a.CalerReturns();
km.setText(String.valueOf(u));
}
});
//窗口属性
new JFrame();
this.setLocationRelativeTo(null);
this.setTitle("程序设计比赛");
this.setResizable(false);
this.setSize(700, 400);
this.setVisible(true);
}
}
计算类:
/*
* 计算结果
*/
package 技能竞赛4;
import java.util.*;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.swing.JOptionPane;
public class CalerReturn {
//获取计算内容
public static String content;
//计算结果
public static Object result;
public static Object CalerReturns(){
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
try {
Object results = engine.eval(content);
result=results;
} catch (ScriptException e) {
// TODO Auto-generated catch block
JOptionPane.showMessageDialog(null,"你输入的字符可能不是运算符或中文!");
}
return result;
}
}
