for(int i=0; i<4; i++){
              System.out.println("i: " + i);
              for(int j=0; i<4; j++) {
                  if (rzs[i][j].equals(asu[i][j])) { buffer[i][j]=rzs[i][j];  }
                                     }
     
                    }

    for(int i=0; i<2; i++){
              for(int j=0; i<2; j++) {
                  if (rzs[i][j]==asu[i][j]) { buffer[i][j]=rzs[i][j];  }
                                     }
     
                    }

int buffer[][] = new int[4][2];    
int rzs[][] = new int[4][2];
int asu[][] = new int[2][2];

import java.util.Arrays;
public class HelloWorld{

    
        public static void main(String []args){
        int buffer[][] = new int[3][3];    
        int rzs[][] = new int[3][3];
        rzs[0][0] = 3; rzs[1][0] = 5; rzs[2][0] = 8; 
        rzs[0][1] = 1110; rzs[1][1] = 2110; rzs[2][1] = 3110; 
        rzs[0][2] = 1120; rzs[1][2] = 2120; rzs[2][2] = 3120; 
        System.out.println(Arrays.deepToString(rzs));
        int asu[][] = new int[3][3];
        asu[0][0] = 1110; asu[1][0] = 2110; asu[2][0] = 1110; 
        asu[0][1] = 5; asu[1][1] = 1; rzs[2][1] = 1; 
        asu[0][2] = 0; asu[1][2] = 7; rzs[2][2] = 7; 
        System.out.println(Arrays.deepToString(asu));
        
         for(int i=0; i<asu.length; i++){
             
             System.out.println("i is: " + i);
             System.out.println("asu    rzs");
              for(int j=0; j<asu[i].length; j++) {
      
                  
                  System.out.println(asu[i][j] + "   " + rzs[i][j]);
                  if (rzs[i][j]==asu[i][j]) { buffer[i][j]=rzs[i][j];  }
                                     }
     
                    }
     /*   System.out.println(Arrays.deepToString(buffer)); */
}
}

int[][] a = new int[][]{
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9},
};

   
        String[] asu = {"M1","M1","M1","M3","M4","M5","M1","M1","M1","M4","M5","M5"};
        String[][] rzs = {
            {"M1","M2","M3","M4","M5"},
            {"M1","M2","M3","M4","M5"},
            {"M1","M2","M3","M4","M5"},
            {"M1","M2","M3","M4"},
            {"M2","M3","M4"},
            {"M1"},
            {"M1"},
            {"M1"}
            
        };
 }