遇到一个很纠结的问题
import java.util.*;
class temp
{
public static void main(String []args)
{
Scanner sc=new Scanner(System.in);
int count=sc.nextInt();
int b=1;
for (int i=1; i<=count; i++)
{
if (!(i%2==0))
{
for (int j=count/2+1;j>b;j--)//j=count/2+1
{
System.out.print(" ");
}
}
for (int y=1; y<=i; y++)
{
if (!(i%2==0))
{
System.out.print("*");
}
}
if (!(i%2==0))
{
System.out.println();
b++;
}
}
int a=1;
for (int i=count-2; i>0; i--)
{
if (!(i%2==0))
{
for (int j=0; j<a; j++)
{
System.out.print(" ");
}
}
for (int y=i; y>0; y--)
{
if (!(i%2==0))
{
System.out.print("*");
}
}
if (!(i%2==0))
{
System.out.println();
a++;
}
}
}
}
private int len=3;
public void printRhombus(){
if(len%2==0) --len;
for (int i =len/2; i >=-len/2; i--) {
System.out.print(repeatStr(" ", Math.abs(i)));
System.out.print(repeatStr("*", len-Math.abs(i)*2));
System.out.println(repeatStr(" ", Math.abs(i)));
}
}
public String repeatStr(String str,int repeatCount){
if(str==null
[解决办法]
str.length()==0
------解决方案--------------------
repeatCount<=0) return "";
StringBuffer buf=new StringBuffer();
for (int i = 0; i < repeatCount; i++) buf.append(str);
return buf.toString();
}
import java.util.Scanner;
public class B
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
for(int i = 1;i <= n;i++)
{
for(int j = n - i;j >= 0;j--)
{
System.out.print(" ");
}
for(int j = 1;j <= (2 * i - 1);j++)
System.out.print("*");
System.out.println();
}
for(int i = n -1;i > 0;i--)
{
for(int j = n - i;j >= 0;j--)
{
System.out.print(" ");
}
for(int j = 1;j <= (2 * i - 1);j++)
System.out.print("*");
System.out.println();
}
}
}
public class Main {
public static void main(String[] args) {
printDiamond(6);
}
public static void printDiamond(int edge){
String star = "*";
int i = 0;
for(;i<edge-1;i++){
System.out.print(" ");
}
i=0;
for(;i<edge;i++){
System.out.print(star);
}
System.out.println();
int space1 = edge-1;
int space2 = space1+edge-2;
i=0;
int j;
for(;i<edge-2;i++){
j = 0;
for(;j<space2;j++){
if(j==space1-1){
System.out.print(star);
}else{
System.out.print(" ");
}
}
System.out.print(star);
System.out.println();
space1--;
space2--;
}
i=0;
for(;i<edge;i++){
System.out.print(star);
}
}
}
