java绘制三角形

三角形的绘制

package base.scanner;

public class SanDemo01 {
    public static void main(String[] args) {
        int a=0,j,k,m;
        for (int i = 1; i < 5; i++) {
            for (j=5;j>i;j--){
                System.out.print(" ");
            }
            for (k=1;k<=i;k++){
                System.out.print("*");
            }
            for (k=1;k<i;k++){
                System.out.print("*");
            }
            System.out.println();


        }
    }
}