輸出空心菱形

public class Star01 {

	public static void main(String[] args) {
		 int i=0,j=0;
		   for(i=1;i<=5;i++){
			   for(j=1;j<=5-i;j++){
				   System.out.print(" "); 
			   }
				   System.out.print("*"); 
				 
				for(j=1;j<=2*i-3;j++){
					  System.out.print(" "); 
				 }
				if(i!=1){
				 System.out.print("*"); 
				}
				 System.out.println(""); 
		   }
		   for(i=1;i<=4;i++){
			   for(j=2;j<=1+i;j++){
				   System.out.print(" "); 
			   }
			   System.out.print("*"); 
			   for(j=3;j>=2*i-3;j--){
				   System.out.print(" "); 
			   }
			  if(i!=4){
			   System.out.print("*"); 
			   }
			   System.out.println();
		   }
		   
	}

}