Breaking Lines vom Raster

Question

Das Raster sieht so aus. http://a4.sphotos.ak.fbcdn.net/hphotos-ak-prn1/s320x320/532063_426018057411895_100000111130260_1879195_1266764275_n.jpg

Ich habe die if-Anweisung in die Schleife eingefügt, um die Linien zu zeichnen, um einen Zeilenumbruch zu machen. Das Programm funktioniert jedoch so, als ob die if-Anweisung nicht vorhanden wäre. Ist die if-Anweisung nicht genug?

import java.awt.*; 
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Graphics; 
import javax.swing.*; 

public class Grid extends Canvas{ 

    Cell[][] maze; 
    int rows; 
    int cols; 
    int pathSize; 
    double width, height; 


    public Grid(int rows, int cols, int h, int w) { 
     this.rows = rows; 
     this.cols = cols; 
     maze = new Cell[rows][cols]; 
     setPreferredSize(new Dimension(h,w)); 
    } 


    public static void main(String[] args){ 
    JFrame y = new JFrame(); 
    y.setLayout(new BorderLayout()); 
    Grid f = new Grid(25,25,400,400); 
    y.add(f, BorderLayout.CENTER); 
    y.setSize(450,450); 
    y.setVisible(true); 
    y.setDefaultCloseOperation(y.EXIT_ON_CLOSE); 

    } 
    public void paint(Graphics g) { 
     int k,j,z=0; 
     width = getSize().width; 
     height = getSize().height; 

     double htOfRow = height/(rows); 
     for (k = 0; k < rows; k++) 
      for(j=0; j< rows+1; j++){ 
      if(j!=3){ 
      g.drawLine(z, (int) (k * htOfRow) , (int) (j*(width/rows)) , (int) (k * htOfRow)); 
      z=(int)(j*(width/rows)); 
      }} 
     double wdOfRow = width/(cols); 
     for (k = 0; k < cols; k++) 
      for(j=0; j< cols+1; j++){ 
      if(j!=3){ 
      g.drawLine((int) (k*wdOfRow) , z,(int) (k*wdOfRow) , (int) (j*(height/cols))); 
      z=(int)(j*(height/cols));}} 
     } 
} 

class Cell{} 

Answer 1

Sie hatten einige Logikfehler in Ihren Zeichnungsschleifen. Ich denke, das sollte funktionieren:

import java.awt.*; 
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Graphics; 
import javax.swing.*; 

public class Grid extends Canvas { 

    Cell[][] maze; 
    int rows; 
    int cols; 
    int pathSize; 
    double width, height; 

    public Grid(int rows, int cols, int h, int w) { 
     this.rows = rows; 
     this.cols = cols; 
     maze = new Cell[rows][cols]; 
     setPreferredSize(new Dimension(h, w)); 
    } 

    public static void main(String[] args) { 
     JFrame y = new JFrame(); 
     y.setLayout(new BorderLayout()); 
     Grid f = new Grid(40, 25, 400, 400); 
     y.add(f, BorderLayout.CENTER); 
     y.setSize(450, 450); 
     y.setVisible(true); 

    } 

    public void paint(Graphics g) { 
     int k, j, z = 0; 
     width = getSize().width; 
     height = getSize().height; 

     double htOfRow = height/(rows); 
     double wdOfRow = width/(cols); 

     for (j = 0; j < rows; j++) { 
      for (k = 0; k < cols; k++) { 
       g.drawLine((int) (k * wdOfRow), (int) (j * htOfRow), (int) (k * wdOfRow), (int) ((j+1) * htOfRow)); 
      } 
     } 
     for (j = 0; j < rows; j++) { 
      for (k = 0; k < cols; k++) { 
       g.drawLine((int) (k * wdOfRow), (int) (j * htOfRow), (int) ((k+1) * wdOfRow), (int) (j * htOfRow)); 
      } 
     } 
    } 

    class Cell { 
    } 
}