Leer 2 matrices y sumarlas
import java.util.*;
public class sumarm{
public static void main(){
int a[][] = new int[3][3];
int b[][] = new int[3][3];
int x[][] = new int[3][3];
int i,j;
Scanner teclado = new Scanner (System.in);
System.out.println("Escribe los valores de la matriz A");
for (i=0;i<3;i++){
for (j=0;j<3;j++){
System.out.print(i+","+j+": ");
a[i][j] = teclado.nextInt();
}
}
System.out.println("");
System.out.println("Escribe los valores de la matriz B");
for (i=0;i<3;i++){
for (j=0;j<3;j++){
System.out.print(i+","+j+": ");
b[i][j] = teclado.nextInt();
}
}
for (i=0;i<3;i++){
for (j=0;j<3;j++){
x[i][j] = a[i][j]+b[i][j];
}
}
System.out.println("");
System.out.println("La suma de las matrices es: ");
for (i=0;i<3;i++){
for (j=0;j<3;j++){
System.out.print(x[i][j]+"|");
}
System.out.println("");
}
}
}