lblock.java

我自己写的一个java tetrix。是上学期的作业

import java.util.*;
import java.io.*;

/** the L-block class. include its generate method. rotate methods and the check methods. */
public class lblock extends block
{

/** using 'count'to store the rotation times of the block and to note the status(position) of the block. */
      private int count=0;

/** generate new block using the row[4],col[4] to store the location of the new block. */
      public lblock()
      {
		  tile[0][4]='*';
		  tile[1][4]='*';
		  tile[2][4]='*';
		  tile[2][5]='*';

		  row[0]=0; col[0]=4;
		  row[1]=1; col[1]=4;
		  row[2]=2; col[2]=4;
		  row[3]=2; col[3]=5;
          left = true;
          right = true;
          down = true;
          count = 0;
	  }

/** unlike the Move_Downward,Left,Right methods. Check and Rotation is different depend on the shape and position of the block. */
	public void rotate()
	{
      switch(count%4)
      {
		  case 0: if(col[0]!=0)
		          {
					  tile[row[0]][col[0]]=' ';
					  tile[row[1]][col[1]]=' ';
					  tile[row[2]][col[2]]=' ';
					  tile[row[3]][col[3]]=' ';

					  tile[row[1]+1][col[1]-1]='*';
					  tile[row[1]][col[1]-1]='*';
					  tile[row[1]][col[1]]='*'; /** row2, col2 is the center */
					  tile[row[1]][col[1]+1]='*';

					  row[0]=row[1]+1; col[0]=col[1]-1;
					  row[2]=row[1];   col[2]=col[1];
					  row[3]=row[1]; col[3]=col[1]+1;
					  row[1]=row[1]; col[1]=col[1]-1;


					  if(col[0]==0) left=false;
					  if(down==false) down = true;
					  count++;
					  break;

				  }
				  else System.out.println("Can not rotate!");break;

		  case 1: if((row[2]>0)&&(tile[row[2]+1][col[2]]!='*'))
		          {
					  tile[row[0]][col[0]]=' ';
					  tile[row[1]][col[1]]=' ';
					  tile[row[2]][col[2]]=' ';
					  tile[row[3]][col[3]]=' ';

					  tile[row[2]-1][col[2]-1]='*';
					  tile[row[2]-1][col[2]]='*';
					  tile[row[2]][col[2]]='*'; /** row2, col2 is the center */
					  tile[row[2]+1][col[2]]='*';

					  row[0]=row[2]-1; col[0]=col[2]-1;
					  row[1]=row[2]-1; col[1]=col[2];
					  row[3]=row[2]+1; col[3]=col[2];

					  right = true;

					  count++;
					  break;
				  }
				  else System.out.println("Can not rotate!");break;

			case 2: if((col[2]<bwidth-1)&&(tile[row[2]][col[2]-1]!='*')&&(tile[row[2]][col[2]+1]!='*'))
			      {


					  tile[row[0]][col[0]]=' ';
					  tile[row[1]][col[1]]=' ';
					  tile[row[2]][col[2]]=' ';
					  tile[row[3]][col[3]]=' ';

					  tile[row[2]][col[2]-1]='*';
					  tile[row[2]][col[2]]='*';
					  tile[row[2]][col[2]+1]='*'; /** row2, col2 is the center */
					  tile[row[2]-1][col[2]+1]='*';

					  row[0]=row[2]; col[0]=col[2]-1;
					  row[1]=row[2]; col[1]=col[2];
					  row[3]=row[2]-1; col[3]=col[2]+1;
					  col[2]=col[2]+1;

					  if(col[3]==bwidth-1) right = false;

					  if(down==false) down = true;
					  count++;
					  break;
				  }
                  else System.out.println("Can not rotate!");break;

            case 3: if((row[1]<bheight-1)&&(tile[row[1]+1][col[1]]!='*')&&(tile[row[1]+1][col[1]+1]!='*'))
                  {


					  tile[row[0]][col[0]]=' ';
					  tile[row[1]][col[1]]=' ';
					  tile[row[2]][col[2]]=' ';
					  tile[row[3]][col[3]]=' ';

					  tile[row[1]-1][col[1]]='*';
					  tile[row[1]][col[1]]='*';
					  tile[row[1]+1][col[1]]='*'; /** row2, col2 is the center */
					  tile[row[1]+1][col[1]+1]='*';

					  row[0]=row[1]-1; col[0]=col[1];
					  row[2]=row[1]+1; col[2]=col[1];
					  row[3]=row[1]+1; col[3]=col[1]+1;

                     if(row[2]==bheight-1) down = false;
                     if(col[0]==1)  left = true;
                     count++;
                     break;

				  }
                  else System.out.println("Can not rotate!");break;


	  }

	}

/** unlike the Move_Downward,Left,Right methods,Check and Rotation is different depend on the shape and position of the block. */
	public void check()
	{
		if(count%4==0)
		{
          if(col[0]==0)
          left = false;
          else if((tile[row[0]][col[0]-1]=='*')||(tile[row[1]][col[1]-1]=='*')||(tile[row[2]][col[2]-1]=='*'))
          left = false;

          if(col[3]==bwidth-1)
          right = false;
          else if((tile[row[3]][col[3]+1]=='*'))
          right = false;

          if(row[2]==bheight-1)
          down =false;
          else if((tile[row[2]+1][col[2]]=='*')||(tile[row[3]+1][col[3]]=='*'))
          down = false;
		}
		else if(count%4==1)
		{
			if(col[0]==0)
			left = false;
			else if((tile[row[0]][col[0]-1]=='*')||(tile[row[1]][col[1]-1]=='*'))
			left = false;

			if(col[3]==bwidth-1)
			right = false;
			else if (tile[row[3]][col[3]+1]=='*')
			right = false;

			if(row[0]==bheight-1)
			down = false;
			else if (tile[row[0]+1][col[0]]=='*')
			down = false;

		}

		else if(count%4==2)
		{
			if(col[0]==0)
			left = false;
			else if((tile[row[0]][col[0]-1]=='*'))
			left = false;

			if(col[3]==bwidth-1)
			right = false;
			else if ((tile[row[3]][col[3]+1]=='*')||(tile[row[2]][col[2]+1]=='*')||(tile[row[1]][col[1]+1]=='*'))
			right = false;

			if(row[3]==bheight-1)
			down = false;
			else if (tile[row[3]+1][col[3]]=='*')
			down = false;

		}


		else if(count%4==3)
		{
			if(col[0]==0)
			left = false;
			else if((tile[row[0]][col[0]-1]=='*'))
			left = false;

			if(col[3]==bwidth-1)
			right = false;
			else if ((tile[row[3]][col[3]+1]=='*')||(tile[row[2]][col[2]+1]=='*'))
			right = false;

			if(row[0]==bheight-1)
			down = false;
			else if ((tile[row[0]+1][col[0]]=='*')||(tile[row[1]+1][col[1]]=='*')||(tile[row[2]+1][col[2]]=='*'))
			down = false;

		}

	}

}