Demo06.java

public class Demo06 {
    public static void main (String []args){
        //打印三角形作业
        for (int i = 1;i <= 5;i++) {
            for (int j = 5; j >= i;j--){
                System.out.print(" ");
            }
            for (int j = 1;j <= i ;j++){
                System.out.print("*");
            }
            for (int j = 1; j < i ;j++){
                System.out.print("*");
            }
            System.out.println();
        }

    }
}