打印指定层数的倒立三角形：

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