calculator.java

自编java计算器

     	 	E=0;
     	 	compute=0;
     	 	num_showing=false;
     	 	panel_display.repaint();
     	 }
     }	 
	
  //back listener
   class back_listener implements ActionListener
     {
     	public void actionPerformed(ActionEvent event)
     	  {
     	  	if(num_count>1)
     	  	  {
     	  	  	if(num_count==if_point)
     	  	  	  if_point=10;
     	  	  	num_count--;
     	  	  	
     	  	  	panel_display.repaint();
     	  	  }
     	  	else if(num_count>0)
     	  	  {
     	  	  	if(num_count==if_point)
     	  	  	  if_point=10;
     	  	  	num_count--;
     	  	  	minus=false;
     	  	  	panel_display.repaint();
     	  	  }  
     	  }
     }	
     
  //minus or positive
  class m_or_p implements ActionListener
    {
      	public void actionPerformed(ActionEvent event)
      	  {
      	  	if(num_count==0 && !minus)
      	  	  {
      	  	  	minus=true;
      	  	  	num_count=1;
      	  	  	if_point=10;
      	  	  	state=0;
      	  	  	panel_display.repaint();
      	  	  }
      	  	else if(num_count==1 && minus )
      	  	  {
      	  	  	minus=false;
      	  	  	num_count=0;
      	  	  	if_point=10;
      	  	  	state=0;
      	  	  	panel_display.repaint();
      	  	  }  
      	  }	
    }
      
     
	public calPanel()
	 {  
	    num_count=0;
	    if_point=10;
	    minus=false;
	    compute=0;
	    num_showing=false;
	    E=0;
	    state=0;
	    
	 	setLayout(new BorderLayout());
	 	setBackground(new Color(105,105,105));
	 
	
	    panel_display=new Display();
	    panel_display.setBackground(Color.yellow);
	  
	 	panel_button=new JPanel();
	 	panel_button.setBackground(Color.pink);
	 
	 
	 	panel_button.setLayout(new GridLayout(4,5,2,2));
	 	
	 	this.add(panel_button,BorderLayout.SOUTH);
	 	this.add(panel_display,BorderLayout.CENTER);
	 	
	 	ActionListener n_listener=new numlistener();
	 	ActionListener compute_listener=new Compute();
	 	ActionListener dot =new pointer();
	 	ActionListener eql =new result();
	 	ActionListener cls=new clear_listener();
	 	ActionListener bak=new back_listener();
	 	ActionListener p_o_m =new m_or_p();
	 		 	
	 	addbutton("7",n_listener);
	 	addbutton("8",n_listener);
	 	addbutton("9",n_listener);
	 	addbutton("*",compute_listener);
	 	addbutton("C",cls);
	 	
	 	addbutton("4",n_listener);
	 	addbutton("5",n_listener);
	 	addbutton("6",n_listener);
	 	addbutton("/",compute_listener);
	 	addbutton("←",bak);
	 	
	 	addbutton("1",n_listener);
	 	addbutton("2",n_listener);
	 	addbutton("3",n_listener);
	 	addbutton("-",compute_listener);
	 	addbutton("+/-",p_o_m);
	 	
	 	addbutton("0",n_listener);
	 	addbutton(".",dot);
	 	addbutton("=",eql);
	 	addbutton("+",compute_listener);
	 	addbutton("x^y",compute_listener);
	 	
	 }
	 
	void addbutton(String name,ActionListener listener)
	  {
	  	JButton button=new JButton(name);
	  	panel_button.add(button);
	  	button.addActionListener(listener);
	  	button.setBackground(Color.gray);
	  	button.setFont(new Font("SansSerif",Font.ITALIC,14));
	  	button.setForeground(Color.white);
	  }
	  
	 //show panel 
	class Display extends JPanel
	 {
	 	 public void paintComponent(Graphics g)
	      {
	 	     super.paintComponent(g);
	 	
	 	     Graphics2D g2=(Graphics2D)g;
	 	     
	 	     if(error)
	 	         {   g2.setPaint(Color.red);
	 	             int x;
	 	             
	 	             for(x=0;x<5;x++)
	 	             {
	 	             	int[]ply_1x=new int[] {50*x+9,50*x+4+9,50*x+24+9,50*x+28+9,50*x+24+9,50*x+4+9};
	   	                int[]ply_1y=new int[] {12,8,8,12,16,16};
	   	                Polygon ply1=new Polygon(ply_1x,ply_1y,6);;
	   	                int[]ply_2x=new int[] {50*x-1+9,50*x-1+4+9,50*x-1+4+9,50*x-1+9,50*x-1-4+9,50*x-1-4+9};
	   	                int[]ply_2y=new int[] {13,17,35,39,35,17}; 
	   	                Polygon ply2=new Polygon(ply_2x,ply_2y,6);
	   	                int[]ply_5x=new int[] {50*x-1+9,50*x-1+4+9,50*x-1+4+9,50*x-1+9,50*x-1-4+9,50*x-1-4+9};
	   	                int[]ply_5y=new int[] {41,45,63,67,63,45};
	   	                Polygon ply5=new Polygon(ply_5x,ply_5y,6);
	   	                g2.fill(ply1);
	   	                g2.fill(ply2);
	   	                g2.fill(ply5);
	   	              }
	   	             for(x=1;x<5;x++)
	   	             {
	   	                int[]ply_3x=new int[] {50*x+29+9,50*x+29+4+9,50*x+29+4+9,50*x+29+9,50*x+29-4+9,50*x+29-4+9};
	   	                int[]ply_3y=new int[] {13,17,35,39,35,17};
	   	                Polygon ply3=new Polygon(ply_3x,ply_3y,6);
	   	                int[]ply_6x=new int[] {50*x+29+9,50*x+29+4+9,50*x+29+4+9,50*x+29+9,50*x+29-4+9,50*x+29-4+9};
	   	                int[]ply_6y=new int[] {41,45,63,67,63,45};
	   	                Polygon ply6=new Polygon(ply_6x,ply_6y,6);	
	   	                g2.fill(ply3);
	   	                g2.fill(ply6);
	   	           	 }
	   	             
	   	             for(x=0;x<3;x++)
	   	             {
	   	                int[]ply_4x=new int[] {50*x+9,50*x+4+9,50*x+24+9,50*x+28+9,50*x+24+9,50*x+4+9};
	   	                int[]ply_4y=new int[] {40,36,36,40,44,44};
	   	                Polygon ply4=new Polygon(ply_4x,ply_4y,6);
	   	                g2.fill(ply4);	
	   	             }
	   	                int[]ply_4x=new int[] {200+9,200+4+9,200+24+9,200+28+9,200+24+9,200+4+9};
	   	                int[]ply_4y=new int[] {40,36,36,40,44,44};
	   	                Polygon ply4=new Polygon(ply_4x,ply_4y,6);
	   	                g2.fill(ply4);
	   	               
	   	                int[]ply_70x=new int[] {0+9,4+9,22+9,26+9,22+9,4+9};
	   	                int[]ply_70y=new int[] {68,64,64,68,72,72};
	   	                Polygon ply70=new Polygon(ply_70x,ply_70y,6);
	   	                g2.fill(ply70);
	   	                
	   	                int[]ply_7x=new int[] {150+9,150+4+9,150+24+9,150+28+9,150+24+9,150+4+9};
	   	                int[]ply_7y=new int[] {68,64,64,68,72,72};
	   	                Polygon ply7=new Polygon(ply_7x,ply_7y,6);
	   	                g2.fill(ply7);
	 	         }
	 	         
	 	     else
	 	     {
	 	         if(E!=0)   
	 	           { Font font=new Font("SansSerif",Font.BOLD,82);
	 	             g2.setFont(font);
	 	             g2.setPaint(Color.GREEN);
	 	             String s= String.valueOf(E);
	 	             g2.drawString(s,550,70);
	 	             
	 	            
	 	             g2.setPaint(Color.red);
	 	           
	 	           
	 	             int[] ply_1x=new int[] {509,509+4,509+24,509+28,509+24,509+4};
	   	             int[] ply_1y=new int[] {12,8,8,12,16,16};
	   	             Polygon ply1=new Polygon(ply_1x,ply_1y,6);
	   	             
	   	             int[] ply_2x=new int[] {508,508+4,508+4,508,508-4,508-4};
	   	             int[] ply_2y=new int[] {13,17,35,39,35,17};
	   	             Polygon ply2=new Polygon(ply_2x,ply_2y,6);
	   	             
	   	             int[] ply_4x=new int[] {509,509+4,509+24,509+28,509+24,509+4};
	   	             int[] ply_4y=new int[] {40,36,36,40,44,44};
	   	             Polygon ply4=new Polygon(ply_4x,ply_4y,6);
	   	             
	   	             int[] ply_5x=new int[] {508,508+4,508+4,508,508-4,508-4};
	   	             int[] ply_5y=new int[] {41,45,63,67,63,45};
	   	             Polygon ply5=new Polygon(ply_5x,ply_5y,6);
	   	             
	 	             int[] ply_7x=new int[] {509,509+4,509+24,509+28,509+24,509+4};
	   	             int[] ply_7y=new int[] {68,64,64,68,72,72};
	   	             Polygon ply7=new Polygon(ply_7x,ply_7y,6);
	   	             
	   	             g2.fill(ply1);
	   	             g2.fill(ply2);
	   	             g2.fill(ply4);
	   	             g2.fill(ply5);
	   	             g2.fill(ply7);
	 	           
	 	           }
	 	         if(if_point<10)
	 	           { 
	 	             g2.setPaint(Color.BLUE);
	 	           	 int i=if_point;
	 	           	 Rectangle2D point=new Rectangle2D.Double(45+50*(i-1),67,5,5);
	 	             g2.fill(point);
	 	           }  
	 	          if(num_count>0)
	 	           {
	 	           	 g2.setPaint(Color.magenta); 
	 	           	 if(minus)
	 	           	   {
	 	           	   	 int[] ply_4x=new int[] {9,9+4,9+24,9+28,9+24,9+4};
	   	                 int[] ply_4y=new int[] {40,36,36,40,44,44};
	   	                 Polygon ply4=new Polygon(ply_4x,ply_4y,6);
	   	                 g2.fill(ply4);
	 	           	   }
	 	           	 else
	 	           	   {
	 	           	   	 number_show number=new number_show(display_num[0],1);
	 	           	   	 ArrayList arry=number.number();
	 	           	   	 for(int i=0;i<arry.size();i++)
	 	                    {
	 	  	                  g2.fill((Polygon)arry.get(i));
	 	                    }
	 	           	   } 
	 	           	  if(num_count>1)
	 	           	    {
	 	           	      for(int i=1;i<num_count;i++)
	 	           	         {
	 	           	           number_show number=new number_show(display_num[i],i+1);
	 	           	           ArrayList arry=number.number();
	 	           	           for(int x=0;x<arry.size();x++)
	 	                          {
	 	  	                        g2.fill((Polygon)arry.get(x));
	 	                          }
	 	           	           	
	 	           	         }	
	 	           	    } 
	 	           	    
	 	           } 
	 	      
	 	
	 	      
	          }
	      }  
	  
	}  
	
	//number display class
	class number_show
	{ 
	  private int num; 
	  private int location;
	  private int[] ply_1x;
	  private int[] ply_2x;
	  private int[] ply_3x;
	  private int[] ply_4x;
	  private int[] ply_5x;
	  private int[] ply_6x;
	  private int[] ply_7x;
	  private int[] ply_1y;
	  private int[] ply_2y;
	  private int[] ply_3y;
	  private int[] ply_4y;
	  private int[] ply_5y;
	  private int[] ply_6y;
	  private int[] ply_7y;
	  
	  private ArrayList poly;
	  
	
	  public number_show(int n,int loc)
	   {
	   	 num=n;
	   	 location=loc;
	   	 
	   	 int x=50*(location-1)+9;
	   	 int x1=x-1;
	   	 int x2=x+29;
	   	 
	   	 ply_1x=new int[] {x,x+4,x+24,x+28,x+24,x+4};
	   	 ply_1y=new int[] {12,8,8,12,16,16};
	   	 
	   	 ply_2x=new int[] {x1,x1+4,x1+4,x1,x1-4,x1-4};
	   	 ply_2y=new int[] {13,17,35,39,35,17};
	   	 
	   	 ply_3x=new int[] {x2,x2+4,x2+4,x2,x2-4,x2-4};
	   	 ply_3y=new int[] {13,17,35,39,35,17};
	   	 
	   	 ply_4x=new int[] {x,x+4,x+24,x+28,x+24,x+4};
	   	 ply_4y=new int[] {40,36,36,40,44,44};
	   	 
	   	 ply_5x=new int[] {x1,x1+4,x1+4,x1,x1-4,x1-4};
	   	 ply_5y=new int[] {41,45,63,67,63,45};
	   	 
	   	 ply_6x=new int[] {x2,x2+4,x2+4,x2,x2-4,x2-4};
	   	 ply_6y=new int[] {41,45,63,67,63,45};
	   	 
	   	 ply_7x=new int[] {x,x+4,x+24,x+28,x+24,x+4};
	   	 ply_7y=new int[] {68,64,64,68,72,72};
	   	 
	   	 poly=new ArrayList();
	   	 
	    }
	    
	   public ArrayList number()
	    {
	      Polygon ply1=new Polygon(ply_1x,ply_1y,6);
	      Polygon ply2=new Polygon(ply_2x,ply_2y,6);
	      Polygon ply3=new Polygon(ply_3x,ply_3y,6);
	      Polygon ply4=new Polygon(ply_4x,ply_4y,6);
	      Polygon ply5=new Polygon(ply_5x,ply_5y,6);
	      Polygon ply6=new Polygon(ply_6x,ply_6y,6);
	      Polygon ply7=new Polygon(ply_7x,ply_7y,6);
	      
	      if(num==0)
	       {
	       	   poly.add(ply1);
	       	   poly.add(ply2);
	       	   poly.add(ply3);
	       	   poly.add(ply5);
	       	   poly.add(ply6);
	       	   poly.add(ply7);
	       	   
	       }
	       else if(num==1)
	        {
	        	poly.add(ply3);
	        	poly.add(ply6);
	        	
	        }
	       else if(num==2) 
	        {
	        	poly.add(ply1);
	        	poly.add(ply3);
	        	poly.add(ply4);
	        	poly.add(ply5);
	        	poly.add(ply7);
	        	
	        }
	       else if(num==3)
	        {
	        	poly.add(ply1);
	        	poly.add(ply3);
	        	poly.add(ply4);
	        	poly.add(ply6);
	        	poly.add(ply7);
	        	
	        } 
	       else if(num==4)
	        {
	        	poly.add(ply2);
	        	poly.add(ply3);
	        	poly.add(ply4);
	        	poly.add(ply6);
	        	
	        } 
	       else if(num==5)
	        {
	        	poly.add(ply1);
	        	poly.add(ply2);
	        	poly.add(ply4);
	        	poly.add(ply6);
	        	poly.add(ply7);
	        
	        } 
	       else if(num==6)
	        {
	        	poly.add(ply1);
	        	poly.add(ply2);
	        	poly.add(ply4);
	        	poly.add(ply5);
	        	poly.add(ply6);
	        	poly.add(ply7);
	        	
	        } 
	       else if(num==7)
	        {
	        	poly.add(ply1);
	        	poly.add(ply3);
	        	poly.add(ply6);
	        	
	        }
	       else if(num==8)
	        {
	        	poly.add(ply1);
	        	poly.add(ply2);
	        	poly.add(ply3);
	        	poly.add(ply4);
	        	poly.add(ply5);
	        	poly.add(ply6);
	        	poly.add(ply7);
	        	
	        }  
	       else if(num==9)
	        {
	        	poly.add(ply1);
	        	poly.add(ply2);
	        	poly.add(ply3);
	        	poly.add(ply4);
	        	poly.add(ply6);
	        	poly.add(ply7);
	        	
	        } 
	          
	    return poly;      
	       	
	    }
	}
	

	
	  
}