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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.awt.*;
  4. import javax.swing.*;
  5. import java.awt.event.*;
  6.  
  7. public class calculate extends WindowAdapter
  8. {
  9. 	private JTextField Jtext=new JTextField("0.");
  10. 	private JFrame f=new JFrame("简单计算器");
  11. 	private String x="";
  12. 	private String y="";
  13. 	private String cal="";
  14. 	private boolean flag1=true;
  15. 	private boolean flag2=false;
  16.  
  17. 	public void init()   //初始化
  18. 	{
  19. 		String[] buttonValue=new String[]{"1","2","3","+","C","4","5","6","-","退格","7","8","9","*",
  20. 				"1/x","0","+/-",".","/","="};
  21. 		Container contain=f.getContentPane();
  22. 		JPanel JPan=new JPanel();
  23. 		JButton[] Jb=new JButton[20];
  24. 		contain.setLayout(new BorderLayout());    //采用4行5列的网格布局
  25. 		JPan.setLayout(new GridLayout(4,5));
  26. 		Jtext.setHorizontalAlignment(JTextField.RIGHT);
  27. 		contain.add(Jtext,"North");
  28. 		contain.add(JPan);
  29. 		A num=new A();   //数据
  30. 		Operation op=new Operation();    //运算符
  31. 		Clear cl=new Clear(); //清零
  32. 		CountDown count_d=new CountDown();   //倒数
  33. 		Strains stra=new Strains();          //相反数
  34. 		Result re=new Result();  //结果
  35. 		BackSpace back=new BackSpace();  //退格
  36.  
  37. 		for(int i=0;i<Jb.length;i++)     //利用for循环添加按钮
  38. 		{
  39. 			Jb[i]=new JButton(buttonValue[i]);
  40. 			JPan.add(Jb[i]);
  41. 			if(i==3||i==8||i==13||i==18)
  42. 				Jb[i].addActionListener(op);
  43. 			if(i==0||i==1||i==2||i==5||i==6||i==7||i==10||i==11||i==12||i==15||i==17)
  44. 				Jb[i].addActionListener(num);
  45. 			if(i==3||i==4||i==8||i==9||((i>12)&&(i<=19)&&(i!=15)))
  46. 				Jb[i].setForeground(new Color(255,0,0));
  47. 			else 
  48. 				Jb[i].setForeground(new Color(0,0,255));   //设置按钮颜色
  49. 		}
  50. 		Jb[4].addActionListener(cl);
  51. 		Jb[9].addActionListener(back);
  52. 		Jb[14].addActionListener(count_d);
  53. 		Jb[16].addActionListener(stra);
  54. 		Jb[19].addActionListener(re);
  55. 		f.setSize(320,240);
  56. 		f.setVisible(true);
  57. 		f.addWindowListener(                           //采用匿名类实现窗口的正常关闭
  58. 				new WindowAdapter()
  59. 				{
  60. 					public void windowClosing(WindowEvent e)
  61. 					{System.exit(0);}	
  62. 				});		
  63. 	}
  64.  
  65. 	class A implements ActionListener                 //输入数据  
  66. 	{
  67. 		public void actionPerformed(ActionEvent e)
  68. 		{
  69. 			String a=Jtext.getText();
  70. 			String s=e.getActionCommand();
  71. 			if(a.equals("0.")||a.equals("+")||a.equals("-")||a.equals("*")||a.equals("/"))
  72. 				Jtext.setText(s);
  73. 			else{
  74. 				if(flag2)
  75. 				{Jtext.setText(s);
  76. 				 flag2=false;}
  77. 				else
  78. 					Jtext.setText(a+s);
  79. 			    }
  80. 		}
  81. 	}
  82.  
  83. 	class Operation implements ActionListener
  84. 	{
  85. 		public void actionPerformed(ActionEvent e)
  86. 		{
  87. 			cal=e.getActionCommand();
  88. 			if(flag1==true)
  89. 				x=Jtext.getText();
  90. 			Jtext.setText(cal);
  91. 			flag1=false;
  92. 		}
  93. 	}
  94.  
  95. 	class Clear implements ActionListener    //清零功能
  96. 	{
  97. 		public void actionPerformed(ActionEvent e)
  98. 		{
  99. 			Jtext.setText("0.");
  100. 		}
  101. 	}
  102.  
  103. 	class CountDown implements ActionListener   //求倒数类
  104. 	{
  105. 		public void actionPerformed(ActionEvent e) 
  106. 		{
  107. 			String s=e.getActionCommand();
  108. 			String s1 = Jtext.getText(); 
  109. 			if(s.equals("1/x"))
  110. 				s1=new String(""+1/Double.parseDouble(s1));
  111. 			Jtext.setText(s1);
  112. 		}
  113. 	}
  114.     class Strain implements ActionListener  //求相反数类
  115.     {
  116.     	public void actionPerformed(ActionEvent e)
  117.     	{
  118.     		String s=e.getActionCommand();
  119.     		String s1=Jtext.getText();
  120.     		if(s.equals("+/-"))
  121.     			s1=new String(""+(0-Double.parseDouble(s1)));
  122.     		Jtext.setText(s1);
  123.     	}
  124.     }
  125.  
  126.     class BackSpace implements ActionListener  //退格功能
  127.     {
  128.     	public void actionPerformed(ActionEvent e)
  129.     	{
  130.     		String s=e.getActionCommand();
  131.     		String s1=Jtext.getText();
  132.     		if(s.equals("退格"))
  133.     			s1=new String(s1.substring(0,s1.length()-1));
  134.     		Jtext.setText(s1);
  135.     	}
  136.     }
  137.  
  138.     class Result implements ActionListener  //计算并显示结果
  139.     {
  140.     	public void actionPerformed(ActionEvent e)
  141.     	{
  142.     		double num1;
  143.     		num1=Double.parseDouble(x);
  144.     		y=Jtext.getText();
  145.     		double num2;
  146.     		num2=Double.parseDouble(y);
  147.     		double result=0;
  148.     		if(num2!=0)
  149.     		{
  150.     			if(cal.equals("+"))  
  151.     				result=num1+num2;
  152.     			if(cal.equals("-"))
  153.     				result=num1-num2;
  154.     			if(cal.equals("*"))
  155.     				result=num1*num2;
  156.     			String s1=Double.toString(result);
  157.     			Jtext.setText(s1); 						
  158.     		}
  159.     		if(cal.equals("/"))
  160.     		{
  161.     			if(num2==0)
  162.     				Jtext.setText("除数不能为0");
  163.     			else
  164.     			{
  165.     				result=num1/num2;
  166.     				String s1=Double.toString(result);
  167.     				Jtext.setText(s1);
  168.     			}
  169.     		}
  170.     		flag1=true;
  171.     		flag2=true;
  172.     	}
  173.     }
  174.  
  175.     public static void main(String[] args) //main方法
  176.     {
  177.     	calculate count=new calculate();
  178.     	count.init();
  179.     }
  180.  
  181. }
  182.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:105: error: illegal character: '\u00a0'
		public void actionPerformed(ActionEvent?e)?
		                                       ^
Main.java:105: error: ';' expected
		public void actionPerformed(ActionEvent?e)?
		                                        ^
Main.java:105: error: illegal start of type
		public void actionPerformed(ActionEvent?e)?
		                                         ^
Main.java:105: error: illegal character: '\u00a0'
		public void actionPerformed(ActionEvent?e)?
		                                          ^
Main.java:105: error: ';' expected
		public void actionPerformed(ActionEvent?e)?
		                                           ^
Main.java:109: error: illegal start of type
			if(s.equals("1/x"))
			^
Main.java:109: error: <identifier> expected
			if(s.equals("1/x"))
			           ^
Main.java:109: error: ';' expected
			if(s.equals("1/x"))
			            ^
Main.java:109: error: illegal start of type
			if(s.equals("1/x"))
			                 ^
Main.java:109: error: <identifier> expected
			if(s.equals("1/x"))
			                  ^
Main.java:109: error: ';' expected
			if(s.equals("1/x"))
			                   ^
Main.java:110: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				  ^
Main.java:110: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				   ^
Main.java:110: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				      ^
Main.java:110: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				             ^
Main.java:110: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				              ^
Main.java:110: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				                ^
Main.java:110: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				                 ^
Main.java:110: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				                  ^
Main.java:110: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				                   ^
Main.java:110: error: illegal start of type
				s1=new String(""+1/Double.parseDouble(s1));
				                         ^
Main.java:110: error: <identifier> expected
				s1=new String(""+1/Double.parseDouble(s1));
				                                        ^
Main.java:110: error: ';' expected
				s1=new String(""+1/Double.parseDouble(s1));
				                                         ^
Main.java:111: error: <identifier> expected
			Jtext.setText(s1);
			             ^
Main.java:111: error: <identifier> expected
			Jtext.setText(s1);
			                ^
Main.java:175: error: class, interface, or enum expected
    public static void main(String[] args) //main??
                  ^
Main.java:178: error: class, interface, or enum expected
    	count.init();
    	^
Main.java:179: error: class, interface, or enum expected
    }
    ^
28 errors
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Standard output is empty
https://ideone.com/Vn2nlk
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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