shape.java

一个俄罗斯方块的代码,对于j2me的初学者比较适合

import javax.microedition.lcdui.*;
public final class Shape {
    private static final int[] NEXT = { 0,  2,  1,  4,  5,
                                        6,  3,  8,  9, 10,
                                        7, 12, 13, 14, 11,
                                       16, 15, 18, 17
                                      };
    private static final int[] INIT_TOP = {-1, -1,  0,  0, -1,
                                            0,  0,  0,  0,  0,
                                           -1,  0,  0, -1,  0,
                                           -1,  0, -1,  0
                                          };
    public static final Shape[] SHAPES = {
        new Shape(0, new int[]{0,0,0,0,
                               0,1,1,0,
                               0,1,1,0,
                               0,0,0,0}),
        new Shape(1, new int[]{0,0,0,0,
                               1,1,1,1,
                               0,0,0,0,
                               0,0,0,0}),
        new Shape(2, new int[]{0,1,0,0,
                               0,1,0,0,
                               0,1,0,0,
                               0,1,0,0}),
        new Shape(3, new int[]{0,1,0,0,
                               0,1,0,0,
                               0,1,1,0,
                               0,0,0,0}),
        new Shape(4, new int[]{0,0,0,0,
                               1,1,1,0,
                               1,0,0,0,
                               0,0,0,0}),
        new Shape(5, new int[]{1,1,0,0,
                               0,1,0,0,
                               0,1,0,0,
                               0,0,0,0}),
        new Shape(6, new int[]{0,0,1,0,
                               1,1,1,0,
                               0,0,0,0,
                               0,0,0,0}),
        new Shape(7, new int[]{0,1,0,0,
                               0,1,0,0,
                               1,1,0,0,
                               0,0,0,0}),
        new Shape(8, new int[]{1,0,0,0,
                               1,1,1,0,
                               0,0,0,0,
                               0,0,0,0}),
        new Shape(9, new int[]{0,1,1,0,
                               0,1,0,0,
                               0,1,0,0,
                               0,0,0,0}),
        new Shape(10, new int[]{0,0,0,0,
                                1,1,1,0,
                                0,0,1,0,
                                0,0,0,0}),
        new Shape(11, new int[]{0,1,0,0,
                                1,1,1,0,
                                0,0,0,0,
                                0,0,0,0}),
        new Shape(12, new int[]{0,1,0,0,
                                0,1,1,0,
                                0,1,0,0,
                                0,0,0,0}),
        new Shape(13, new int[]{0,0,0,0,
                                1,1,1,0,
                                0,1,0,0,
                                0,0,0,0}),
        new Shape(14, new int[]{0,1,0,0,
                                1,1,0,0,
                                0,1,0,0,
                                0,0,0,0}),
        new Shape(15, new int[]{0,0,0,0,
                                0,1,1,0,
                                1,1,0,0,
                                0,0,0,0}),
        new Shape(16, new int[]{0,1,0,0,
                                0,1,1,0,
                                0,0,1,0,
                                0,0,0,0}),
        new Shape(17, new int[]{0,0,0,0,
                                1,1,0,0,
                                0,1,1,0,
                                0,0,0,0}),
        new Shape(18, new int[]{0,0,1,0,
                                0,1,1,0,
                                0,1,0,0,
                                0,0,0,0})
    };
    private int index; 
    private int[] data;
    private Shape(final int index, final int[] data) {
        this.index = index;
        this.data =  data;
    }
    public int getIndex()  { return index;  }
    public int getWidth()  { return 4;  }
    public int getHeight() { return 4; }
    public int[] getData() { return data;   }
    public Shape next() { return SHAPES[NEXT[index]]; }
    static int getInitTop(int index) {
        return INIT_TOP[index];
    }
    public void paint(Graphics g, int box_size, int color) {
        for(int i=0; i<4; i++) { 
            for(int j=0; j<4; j++) { 
                if(data[4*j+i]==1) {
                    g.setColor(MyCanvas.BORDER_COLOR);
                    g.drawRect(i*box_size, j*box_size, box_size, box_size);
                    g.setColor(color);
                    g.fillRect(i*box_size+1, j*box_size+1, box_size-2, box_size-2);
                }
            }
        }
    }
    public void erase(Graphics g, int box_size) {
        for(int i=0; i<4; i++) {
            for(int j=0; j<4; j++) {
                if(data[4*j+i]==1) {
                    g.setColor(0);
                    g.drawRect(i*box_size, j*box_size, box_size, box_size);
                    g.fillRect(i*box_size, j*box_size, box_size, box_size);
                }
            }
        }
    }
    public static int indexOf(Shape shape) {
        for(int i=0; i<SHAPES.length; i++) {
            if(SHAPES[i]==shape) return i;
        }
        return 0;
    }
}