fork download
copy 
  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7.  
  8. import java.awt.*;
  9. import javax.swing.*;
  10. import java.awt.event.*;
  11.  
  12. public class calculate extends WindowAdapter
  13. {
  14. 	private JTextField Jtext=new JTextField("0.");
  15. 	private JFrame f=new JFrame("简单计算器");
  16. 	private String x="";
  17. 	private String y="";
  18. 	private String cal="";
  19. 	private boolean flag1=true;
  20. 	private boolean flag2=false;
  21.  
  22. 	public void init()   //初始化
  23. 	{
  24. 		String[] buttonValue=new String[]{"1","2","3","+","C","4","5","6","-","退格","7","8","9","*",
  25. 				"1/x","0","+/-",".","/","="};
  26. 		Container contain=f.getContentPane();
  27. 		JPanel JPan=new JPanel();
  28. 		JButton[] Jb=new JButton[20];
  29. 		contain.setLayout(new BorderLayout());    //采用4行5列的网格布局
  30. 		JPan.setLayout(new GridLayout(4,5));
  31. 		Jtext.setHorizontalAlignment(JTextField.RIGHT);
  32. 		contain.add(Jtext,"North");
  33. 		contain.add(JPan);
  34. 		A num=new A();   //数据
  35. 		Operation op=new Operation();    //运算符
  36. 		Clear cl=new Clear(); //清零
  37. 		CountDown count_d=new CountDown();   //倒数
  38. 		Strains stra=new Strains();          //相反数
  39. 		Result re=new Result();  //结果
  40. 		BackSpace back=new BackSpace();  //退格
  41.  
  42. 		for(int i=0;i<Jb.length;i++)     //利用for循环添加按钮
  43. 		{
  44. 			Jb[i]=new JButton(buttonValue[i]);
  45. 			JPan.add(Jb[i]);
  46. 			if(i==3||i==8||i==13||i==18)
  47. 				Jb[i].addActionListener(op);
  48. 			if(i==0||i==1||i==2||i==5||i==6||i==7||i==10||i==11||i==12||i==15||i==17)
  49. 				Jb[i].addActionListener(num);
  50. 			if(i==3||i==4||i==8||i==9||((i>12)&&(i<=19)&&(i!=15)))
  51. 				Jb[i].setForeground(new Color(255,0,0));
  52. 			else 
  53. 				Jb[i].setForeground(new Color(0,0,255));   //设置按钮颜色
  54. 		}
  55. 		Jb[4].addActionListener(cl);
  56. 		Jb[9].addActionListener(back);
  57. 		Jb[14].addActionListener(count_d);
  58. 		Jb[16].addActionListener(stra);
  59. 		Jb[19].addActionListener(re);
  60. 		f.setSize(320,240);
  61. 		f.setVisible(true);
  62. 		f.addWindowListener(                           //采用匿名类实现窗口的正常关闭
  63. 				new WindowAdapter()
  64. 				{
  65. 					public void windowClosing(WindowEvent e)
  66. 					{System.exit(0);}	
  67. 				});		
  68. 	}
  69.  
  70. 	class A implements ActionListener                 //输入数据  
  71. 	{
  72. 		public void actionPerformed(ActionEvent e)
  73. 		{
  74. 			String a=Jtext.getText();
  75. 			String s=e.getActionCommand();
  76. 			if(a.equals("0.")||a.equals("+")||a.equals("-")||a.equals("*")||a.equals("/"))
  77. 				Jtext.setText(s);
  78. 			else{
  79. 				if(flag2)
  80. 				{Jtext.setText(s);
  81. 				 flag2=false;}
  82. 				else
  83. 					Jtext.setText(a+s);
  84. 			    }
  85. 		}
  86. 	}
  87.  
  88. 	class Operation implements ActionListener
  89. 	{
  90. 		public void actionPerformed(ActionEvent e)
  91. 		{
  92. 			cal=e.getActionCommand();
  93. 			if(flag1==true)
  94. 				x=Jtext.getText();
  95. 			Jtext.setText(cal);
  96. 			flag1=false;
  97. 		}
  98. 	}
  99.  
  100. 	class Clear implements ActionListener    //清零功能
  101. 	{
  102. 		public void actionPerformed(ActionEvent e)
  103. 		{
  104. 			Jtext.setText("0.");
  105. 		}
  106. 	}
  107.  
  108. 	class CountDown implements ActionListener   //求倒数类
  109. 	{
  110. 		public void actionPerformed(ActionEvent e) 
  111. 		{
  112. 			String s=e.getActionCommand();
  113. 			String s1 = Jtext.getText(); 
  114. 			if(s.equals("1/x"))
  115. 				s1=new String(""+1/Double.parseDouble(s1));
  116. 			Jtext.setText(s1);
  117. 		}
  118. 	}
  119.     class Strain implements ActionListener  //求相反数类
  120.     {
  121.     	public void actionPerformed(ActionEvent e)
  122.     	{
  123.     		String s=e.getActionCommand();
  124.     		String s1=Jtext.getText();
  125.     		if(s.equals("+/-"))
  126.     			s1=new String(""+(0-Double.parseDouble(s1)));
  127.     		Jtext.setText(s1);
  128.     	}
  129.     }
  130.  
  131.     class BackSpace implements ActionListener  //退格功能
  132.     {
  133.     	public void actionPerformed(ActionEvent e)
  134.     	{
  135.     		String s=e.getActionCommand();
  136.     		String s1=Jtext.getText();
  137.     		if(s.equals("退格"))
  138.     			s1=new String(s1.substring(0,s1.length()-1));
  139.     		Jtext.setText(s1);
  140.     	}
  141.     }
  142.  
  143.     class Result implements ActionListener  //计算并显示结果
  144.     {
  145.     	public void actionPerformed(ActionEvent e)
  146.     	{
  147.     		double num1;
  148.     		num1=Double.parseDouble(x);
  149.     		y=Jtext.getText();
  150.     		double num2;
  151.     		num2=Double.parseDouble(y);
  152.     		double result=0;
  153.     		if(num2!=0)
  154.     		{
  155.     			if(cal.equals("+"))  
  156.     				result=num1+num2;
  157.     			if(cal.equals("-"))
  158.     				result=num1-num2;
  159.     			if(cal.equals("*"))
  160.     				result=num1*num2;
  161.     			String s1=Double.toString(result);
  162.     			Jtext.setText(s1); 						
  163.     		}
  164.     		if(cal.equals("/"))
  165.     		{
  166.     			if(num2==0)
  167.     				Jtext.setText("除数不能为0");
  168.     			else
  169.     			{
  170.     				result=num1/num2;
  171.     				String s1=Double.toString(result);
  172.     				Jtext.setText(s1);
  173.     			}
  174.     		}
  175.     		flag1=true;
  176.     		flag2=true;
  177.     	}
  178.     }
  179.  
  180.     public static void main(String[] args) //main方法
  181.     {
  182.     	calculate count=new calculate();
  183.     	count.init();
  184.     }
  185.  
  186. }
  187.  
  188.  
  189.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
copy 
Standard input is empty
compilation info 
Main.java:110: error: illegal character: '\u00a0'
		public void actionPerformed(ActionEvent?e)?
		                                       ^
Main.java:110: error: ';' expected
		public void actionPerformed(ActionEvent?e)?
		                                        ^
Main.java:110: error: illegal start of type
		public void actionPerformed(ActionEvent?e)?
		                                         ^
Main.java:110: error: illegal character: '\u00a0'
		public void actionPerformed(ActionEvent?e)?
		                                          ^
Main.java:110: error: ';' expected
		public void actionPerformed(ActionEvent?e)?
		                                           ^
Main.java:114: error: illegal start of type
			if(s.equals("1/x"))
			^
Main.java:114: error: <identifier> expected
			if(s.equals("1/x"))
			           ^
Main.java:114: error: ';' expected
			if(s.equals("1/x"))
			            ^
Main.java:114: error: illegal start of type
			if(s.equals("1/x"))
			                 ^
Main.java:114: error: <identifier> expected
			if(s.equals("1/x"))
			                  ^
Main.java:114: error: ';' expected
			if(s.equals("1/x"))
			                   ^
Main.java:115: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				  ^
Main.java:115: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				   ^
Main.java:115: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				      ^
Main.java:115: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				             ^
Main.java:115: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				              ^
Main.java:115: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				                ^
Main.java:115: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				                 ^
Main.java:115: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				                  ^
Main.java:115: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				                   ^
Main.java:115: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				                         ^
Main.java:115: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				                                        ^
Main.java:115: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				                                         ^
Main.java:116: error: <identifier> expected
			Jtext.setText(s1);
			             ^
Main.java:116: error: <identifier> expected
			Jtext.setText(s1);
			                ^
Main.java:180: error: class, interface, or enum expected
    public static void main(String[] args) //main??
                  ^
Main.java:183: error: class, interface, or enum expected
    	count.init();
    	^
Main.java:184: error: class, interface, or enum expected
    }
    ^
28 errors
stdout
copy 
Standard output is empty
https://ideone.com/26rUlO
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!