ARREGLOS

public class Main {
public static void main(String args[]){
int[][] m = new int[3][3];
int[][] n = new int[3][3];
int[][] resultado = new int[3][3];
int[][] a = new int[3][2];
int[][] b = new int[2][3];
//construimos matriz m
for (int i=0;i<3;i++)
m[i][i]=1;
m[0][1] = 3;
m[0][2] = 2;
m[1][2] = 1;
//construimos matriz n
for (int i=0;i<3;i++)
n[i][i] = 1; for (int i=0;i<3;i++)
for (int j=0;j<3;j++)
resultado[i][j] = m[i][j]+n[i][j];
for (int i=0;i<3;i++){
for (int j=0;j<3;j++){
System.out.print(resultado[i][j]+" ");
}
//System.out.print("\n");
System.out.println();
}
for (int i=0;i<3;i++){
for (int j=0;j<2;j++){
a[i][j]= i+j;
System.out.print(a[i][j]+" ");
}
//System.out.print("\n");
System.out.println();
}
System.out.println();
for (int j=0;j<2;j++)
for (int i=0;i<3;i++)
b[j][i] = a[i][j];
for (int i=0;i<2;i++){
for (int j=0;j<3;j++){
System.out.print(b[i][j]+" ");
}
//System.out.print("\n");
System.out.println();
}
}
}