Java打印菱形，空心菱形

关键字：Java打印菱形,Java打印空心菱形

import java.util.*;
public class rhombus {
void hollow(int s) { //打印空心菱形
int i,k;
for (k = 0; k < s ; k++ ){
for (i = 0; i < s-k-1 ;i++ ){
System.out.print(" ");
}
for (i = 0; i <= k; i++ ) {
if (i == 0 || i == k){
System.out.print("* ");
}
else
System.out.print(" ");
}
System.out.println();
}
for (k = 0; k < s-1; k ++ ){
for (i = 0; i <= k ; i++ ){
System.out.print(" ");
}
for (i = 0; i < s-k-1 ;i++ ) {
if (i == 0 || i == s-k-2) {
System.out.print("* ");
}
else
System.out.print(" ");
}
System.out.println();
}
}
void solid(int s) { // 打印实心菱形
int i,k;
for (k = 0; k < s ; k++ ) {
for (i = 0; i < s-k-1 ;i++ )
{
System.out.print(" ");
}
for (i = 0; i <= k; i++ )
{
System.out.print("* ");
}
System.out.println();
}

for (k = 0; k < s; k ++ )
{
for (i = 0; i <= k ; i++ )
{
System.out.print(" ");
}
for (i = 0; i < s-k-1 ;i++ )
{
System.out.print("* ");
}
System.out.println();
}

}
public static void main(String[] args)
{
System.out.println("请输入一个数:");
Scanner cin = new Scanner(System.in);
int num = cin.nextInt();
rhombus rb = new rhombus();

rb.hollow(num);
System.out.println();
rb.solid(num);
}
}