java : triangle of numbers (pattern)

public static void displayPattern(int x ){

char a =' ';

for (int i=1;i<=x;i++){

for (int j=x-i;j>0;j--){

System.out.printf("%2c",a);

}

for (int k=i;k>=1;k--){

System.out.printf("%2d",k);

}0

System.out.println();

}

}