求JAVA*编写方法

class Diamond{
public static void main(String[] args){
int n=5;
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
if(i<(n/2+1)){
if(i+j>=n/2&&j-i<=n/2) System.out.print("*");
else System.out.print(" ");
}
else{
if(i-j<=n/2&&i+j<=(n+n/2-1)) System.out.print("*");
else System.out.print(" ");
}
}
System.out.println();
}
}
}