菱形
public class Ling {
public static void main(String[]args){
for(int i=1;i<3;i++){
for(int z=1 ;z<6-i;z++ ){
System.out.print(" ");
}
for(int j=0;j<2*i-1;j++){
System.out.print("*");
}
System.out.print(" ");
}
for(int a=1;a<4;a++){
for(int k=0;k<a+1;k++){
System.out.print(" ");
}
for(int s=0;s<7-2*a;s++){
System.out.print("*");
}
System.out.print(" ");
}
}
}