簡單畫函數曲數

幾個類都放一起了，

 

運行效果如下：

 

*                                                |                    **     *                     
  *                                               |                   *        *                    
   *                                              |                  *          *                   
    *                                             |                 *            *                  
     *                                            |                               *                 
      *                                           |                *                                
       *                                          |               *                *                
        *                                         |                                 *               
         *                                        |              *                                  
          *                                       |                                  *              
           *                                      |             *                                   
            *                                     |                                   *             
             *                                    |            *                                    
              *                                   |                                    *            
               *                                  |           *                                     
                *                                 |                                     *           
                 *                                |                                                 
                  *                               |          *                                      
                   *                              |                                      *          
                    *                             |         *                                       
                     *                            |                                       *         
                      *                           |                                                 
                       *                          |        *                                        
                        *                         |                                        *        
                         *                        |       *                                         
                          *                       |                                                 
                           *                      |                                         *       
                            *                     |      *                                          
                             *                    |                                          *      
                              *                   |                                                 
                               *                  |     *                                           
                                *                 |                                           *     
                                 *                |                                                 
                                  *               |    *                                            
                                   *              |                                            *    
                                    *             |                                                 
                                     *            |   *                                             
                                      *           |                                             *   
                                       *          |                                                 
                                        *         |  *                                              
                                         *        |                                              *  
                                          *       |                                                 
                                           *      | *                                               
                                            *     |                                               * 
                                             *    |                                                 
                                              *   |*                                                
*                                              *  |                                                *
                                                * |                                                 
                                                 **                                                 
--------------------------------------------------*-------------------------------------------------
 *                                                |*                                                
                                                 *| *                                               
                                                  |  *                                              
  *                                               |   *                                             
                                                * |    *                                            
                                                  |     *                                           
   *                                              |      *                                          
                                               *  |       *                                         
                                                  |        *                                        
    *                                             |         *                                       
                                              *   |          *                                      
                                                  |           *                                     
     *                                            |            *                                    
                                             *    |             *                                   
                                                  |              *                                  
      *                                           |               *                                 
                                            *     |                *                                
                                                  |                 *                               
       *                                          |                  *                              
                                           *      |                   *                             
        *                                         |                    *                            
                                                  |                     *                           
                                          *       |                      *                          
         *                                        |                       *                         
                                         *        |                        *                        
                                                  |                         *                       
          *                                       |                          *                      
                                        *         |                           *                     
           *                                      |                            *                    
                                       *          |                             *                   
                                                  |                              *                  
            *                                     |                               *                 
                                      *           |                                *                
             *                                    |                                 *               
                                     *            |                                  *              
              *                                   |                                   *             
                                    *             |                                    *            
               *                                  |                                     *           
                                   *              |                                      *          
                *                                 |                                       *         
                 *                *               |                                        *        
                                 *                |                                         *       
                  *                               |                                          *      
                   *            *                 |                                           *     
                    *          *                  |                                            *    
                     *        *                   |                                             *   
                      *     **                    |                                              *  
                       *****                      |                                               * 
                                                  |                                                *
粘進來有點變形了。

 

 

/** * * @author chao.yin * */ public class DrawCurve { public static void main(String[] args) { Stage drawStage=new Stage(); drawStage.initStageArray(); drawStage.initAxis();//x ,y axis drawStage.setExpression(new Expression("y","sin(x)"));//y=sin(x) drawStage.calExpression(); drawStage.setExpression(new Expression("y","-x"));//y=-x drawStage.calExpression(); drawStage.printStage(); } } class Expression{ private String y; private String expressionX; public Expression(){} public Expression(String y,String expressionX){ this.y=y; this.expressionX=expressionX; } public String getY() { return y; } public void setY(String y) { this.y = y; } public String getExpressionX() { return expressionX; } public void setExpressionX(String expressionX) { this.expressionX = expressionX; } } /** * * @author chao yin * */ class Stage{ private int width=100; //width of the x axis private int height=100; //width of the y axis private final String drawXChar="-"; private final String drawYChar="|"; private char[][] stageArray=new char[height][width]; private Expression expression; public Stage(){} public Stage(int width,int height){ this.width=width; this.height=height; } /** * draw x and y axis * method 1 */ public void initAxis(String origin){ int virticalLine; for(virticalLine=0;virticalLine<this.height;++virticalLine){//begin with top int levelLine; for(levelLine=0;levelLine<this.width;++levelLine){//from left to right if(levelLine==this.width/2 && virticalLine==this.height/2){ //draw origin point printChar(origin,0); continue; } if(levelLine==this.width/2){ printChar(this.drawYChar,0); //draw y axis //printChar(String.valueOf((this.heght/2)-virticalLine),0);//print axis number } else if(virticalLine==this.height/2){ printChar(this.drawXChar,0); //draw x axis } else{ printChar(" ",0); } } printChar(" ",1);//new line } } /** * draw x and y axis * method 2 */ public void initAxis(){ int virticalLine; for(virticalLine=0;virticalLine<this.height;++virticalLine){//begin with top int levelLine; for(levelLine=0;levelLine<this.width;++levelLine){//from left to right if(levelLine==this.width/2 && virticalLine==this.height/2){ //draw origin point stageArray[virticalLine][levelLine]='0'; continue; } if(levelLine==this.width/2){ stageArray[virticalLine][levelLine]='|'; } else if(virticalLine==this.height/2){ stageArray[virticalLine][levelLine]='-'; } else{ printChar(" ",0); } } } } /** * init stage */ public void initStageArray(){ for(int x=0;x<this.height;++x){ for(int y=0;y<this.width;++y){ stageArray[x][y]=' '; } } } /** * print stage including axis and curve */ public void printStage(){ for(int x=0;x<this.height;++x){ for(int y=0;y<this.width;++y){ printChar(stageArray[x][y],0); } printChar(" ",1);//new line } } /** * print y=sin(x) */ public void setSinChar(){ double ratioX = (2 * 1.0 * Math.PI) / (this.getWidth() - 1); int multiplicateY = (this.getHeight() - 1) / 2; for (int levelLine = 0; levelLine < this.getWidth(); levelLine++) { double k = (levelLine - this.getWidth() / 2) * ratioX; int vertical = multiplicateY - (int) Math.round(Math.sin(k) * multiplicateY); stageArray[vertical][levelLine] = '*'; } } /** * print y=-x */ public void setLinearChar(){ for(int y=0;y<this.height;++y){ for(int x=0;x<this.width;++x){ if(y==x){ stageArray[y][x]='*'; } } } } public void calExpression(){ if(expression.getExpressionX().indexOf("sin")!=-1){ this.setSinChar(); } if(expression.getExpressionX().indexOf("-x")!=-1){ this.setLinearChar(); } } /** * * @param String chr * @param newLine */ public void printChar(String chr,int newLine){ if(newLine==1){ System.out.println(chr); }else{ System.out.print(chr); } } /** * * @param char chr * @param newLine */ public void printChar(char chr,int newLine){ if(newLine==1){ System.out.println(chr); }else{ System.out.print(chr); } } public int getWidth() { return width; } public void setWidth(int width) { this.width = width; } public int getHeight() { return height; } public void setHeght(int height) { this.height = height; } public void setExpression(Expression expression) { this.expression = expression; } public Expression getExpression() { return expression; } }