• hollow square

package lab2;

public class Practice {

    public static void main(String[] args) {
    	//uppper half
    	for(int i = 1; i<=5;i++) {
    		
    		for(int j = 1; j<=5-i;j++)
    			System.out.print(" ");
    		
    		for(int j = 1; j<=i;j++)
    			System.out.print("*");
    		
    		for(int j =i-1; j>=1;j--)
    			System.out.print("*");
    
    		
    		System.out.println();
    	}
    	
    	//lower half
    	for(int i = 4; i>=1;i--) {
    		
    		for(int j = 1; j<=5-i;j++)
    			System.out.print(" ");
    		
    		for(int j = 1; j<=i;j++)
    			System.out.print("*");
    		
    		for(int j =i-1; j>=1;j--)
    			System.out.print("*");
    
    		
    		System.out.println();
    	}
        
    }
}