java diamond shape:

public class Diamond{
public static void main(String[] args){
int row = 5;
for(int i=1; i<(row/2+.5); i++ ){
for (int j=1; j<(row/2+1.5)-i; j++){
System.out.print(" ");
}
for(int c=0; c<(i*2)-1; c++)
System.out.print(c);
System.out.println();
}
for(int d=1; d<row+1; d++){
System.out.print(d);
}
System.out.println();
for(int i=1; i<(row/2+.5); i++ ){
for(int c=0;c<i; c++)
System.out.print(" ");
for(int j=1; j<row-(i*2)+1; j++){
System.out.print(j);
}
System.out.println();
}
}
}

public class PrintDiamond {
public static void main(String[] args) {
int n = 5;
for (int i = -n; i <= n; i++) {
for (int j = -n; j <= n; j++) {
if (Math.abs(i) + Math.abs(j) <= n){
System.out.print("* ");
}
else {
System.out.print(" ");
}
}
System.out.println();
}
}
}