Question

如何用Java语句 画出一个实心的菱形

Answer 1

public class s{
public static void main(String args[]){

int k = 5; //打印的菱形的大小

for(int i=-k;i<=0;i++){

for(int j=1;j<=Math.abs(i);j++)
System.out.print(" ");

for(int j=1;j<=(k-Math.abs(i))*2+1;j++)
System.out.print("*");

System.out.println();

}

for(int i=0;i>=-k;i--){

for(int j=0;j<=Math.abs(i);j++)
System.out.print(" ");

for(int j=1;j<(k-Math.abs(i))*2;j++)
System.out.print("*");

System.out.println();

}
}
}

Answer 2

import java.util.Scanner;
public class LingXing
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("请输入菱形变长：");
int num = sc.nextInt();
for (int i=1;i<=num;i++)
{
for(int j=1;j<num-i+1;j++)
{
System.out.print(" ");
}
for(int k=1;k<2*i;k++)
{
System.out.print("*");
}System.out.println("");
}
for(int i=1;i<num;i++)
{
for(int j=1;j<=i;j++)
{
System.out.print(" ");
}
for(int k=1;k<2*(num-i);k++)
{
System.out.print("*");
}
System.out.println("");
}
}
}

Answer 3

public class ss {
public static void main(String[] args) {

int n = 5;
for (int i = -n; i <= n; i++)
{
for (int j = -n; j <= n; j++)
{
System.out.print((Math.abs(i) + Math.abs(j) > n - 1) ? " ": "*");
}
System.out.println();
}
}
}