两个for……找下规律呗……

支持

这种都是用for循环解决的

println

package com.java;
import java.util.Scanner;
public class Test {
public static void main(String[] args){
Scanner input =new Scanner(System.in);
System.out.println("How long do you want side to be?");
int row=input.nextInt();
System.out.println("Please enter the character you want it to be made of:");
String str=input.next();
if(row>1){
for (int i = 0; i < row; i++) {
for (int j = 0; j <= i; j++) {
if( i >=2 && j !=0 && j!=i){
System.out.print(" ");
}else{
System.out.print(str);
}
}
System.out.println();
}
for (int i =0; i<row-1; i++) {
for (int j = 0; j <= i; j++) {
System.out.print(" ");
}
for (int j = row-1; j >i; j--) {
if(j==row-1 || j==i+1){
System.out.print(str);
}else{
System.out.print(" ");
}
}
System.out.println();
}
}else{
System.out.println("至少为2!");
}
}
}