optimize the following code

[Sandeep Bhandari]

Below given code prints the following output:

**
****
******
********

public class Sample {
        
  public static void main(String[] args) {
  
int lines = 5,temp=0,j=1;

for (int i=1 ; i<=5 ; i++){
j=i;
while((lines-j) > 0){
System.out.print(" ");
j++;
}
temp = i*2;
while(temp>0){
System.out.print("*");
temp--;
}
j=i;
while((lines-j) > 0){
System.out.print(" ");
j++;
}
System.out.println("");
    }
  }
}

Can you help to remove those nested redundant while loops?? I guess they are causing bottleneck.

[fred rosenberger]

What have you tried? What worked? What didn't?

We're not really going to do it for you...