26 matriz mayor y menor

import java.util.*;
public class matriz4{
public static void main (String[]args){
    Scanner in= new Scanner(System.in);
   int i, x, j, NM1=0,NM2=0,NM3=0,nm1=1000000000,nm2=1000000000,nm3=1000000000;
   //NM1=numero mayor 1, nm1=numero menor1
   int AIbarra[][] = new int[3][3];
   int BIbarra[][] = new int [4][4];
   int CIbarra[][] = new int[5][5];
   int DIbarra[][] = new int [3][2];
 
 
   System.out.print("Introdusca los numeros de matriz A  ");
   System.out.println();
     for(i=0;i<=2;i++){
       for(j=0;j<=2;j++){
                 System.out.print("Introdusca el numero  ");
                 x = in.nextInt();
                 AIbarra[i][j]=x;
                 if(x>NM1)
                 NM1=x;
                 if(x<nm1)
                 nm1=x;
               
                }         
        }
        DIbarra[0][0]=NM1;
        DIbarra[0][1]=nm1;
     System.out.print("Introdusca los numeros de matriz B  ");
     System.out.println();
      for(i=0;i<=3;i++){
         for(j=0;j<=3;j++){
                    System.out.print("Introdusca el numero  ");
                    x = in.nextInt();
                    BIbarra[i][j]=x;
                     if(x>NM2)
                 NM2=x;
                 if(x<nm2)
                 nm2=x;
               
                }
        }
         DIbarra[1][0]=NM2;
        DIbarra[1][1]=nm2;
       System.out.print("Introdusca los numeros de matriz c  ");
       System.out.println();
     for(i=0;i<=4;i++){
        for(j=0;j<=4;j++){
                    System.out.print("Introdusca el numero  ");
                    x = in.nextInt();
                    CIbarra[i][j]=x;
                     if(x>NM3)
                 NM3=x;
                 if(x<nm3)
                 nm3=x;
               
                }
        }
         DIbarra[2][0]=NM3;
        DIbarra[2][1]=nm3;
         System.out.print(" matriz A  ");
   System.out.println();
     for(i=0;i<=2;i++){
        for(j=0;j<=2;j++){
    
                System.out.print (AIbarra[i][j] +"\t");
            }
            System.out.println();
        }
         System.out.println();
         System.out.print("matriz B  ");
         System.out.println();
     for(i=0;i<=3;i++){
        for(j=0;j<=3;j++){
    
                System.out.print (BIbarra[i][j] +"\t");
            }
            System.out.println();
        }
         System.out.println();
         System.out.print("matriz C  ");
         System.out.println();
      for(i=0;i<=4;i++){
        for(j=0;j<=4;j++){
    
                System.out.print (CIbarra[i][j] +"\t");
            }
            System.out.println();
        }
         System.out.println();
          System.out.println();
         System.out.print("matriz D  ");
         System.out.println();
       for(i=0;i<=2;i++){
         for(j=0;j<=1;j++){
    
                System.out.print (DIbarra[i][j] +"\t");
            }
            System.out.println();
        }
         System.out.println();
        }
    }