Question

用JAVA输出倒三角 ******** ****** *** *

Answer 1

public class Test {
public static void main(String[] args) {
int i = 0;
for (i = 7; i >= 1; i -= 2) {
for (int k = (7 - i) / 2; k >= 1; k--){
System.out.print(" ");
}
for (int j = i; j >= 1; j--){
System.out.print("*");
}
System.out.println();
}
}
}

Answer 2

for(int i2=0;i2<5;i2++)
{
for(int h=0;h<=i2;h++)
{
System.out.print(" ");
}
for(int x2=5;x2>i2;x2--)
{
if(((i2==0) && (x2>=1 && x2<=3)) || ((i2==1) && (x2>=1 && x2<=2)) || (i2==2 && x2==1))
System.out.print(" ");
else
System.out.print(" *");
}
System.out.println();
}
}

Answer 3

class Trigle {

public static void main(String[] args) {
int height;
try{height=Integer.parseInt(args[0]);}catch(Exception e){height=4;}
Trigle t=new Trigle();
t.printTrigle(height);
}

public void printTrigle(int height) {
int points=height*2-1;
for(int i=0;i<height;i++,points-=2){
for(int j=0;j<i;j++) System.out.print(" ");
for(int j=0;j<points;j++) System.out.print("*");
System.out.println();
}
}

}

Answer 4

package com.hyb;
public class hyb {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int a=4;
for(int i=0;i<a;i++){
for(int j=0;j<i;j++){
System.out.print(" ");
}
for(int k=(a-i)*2-1;k>0;k--){
System.out.print("#");
}
System.out.println();
}
}
}