Membuat belah ketupat tanpa isi | Java Programming

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class BelahKetupat {
public static void main(String[] args) throws IOException{
int tinggi, setengahTinggi;
String input;
System.out.println("Masukkan tinggi:");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
input = br.readLine();
tinggi = Integer.parseInt(input);
int l = 1;
if (tinggi%2 == 0) {
setengahTinggi = tinggi/2;
for (int i = 0; i < setengahTinggi; i++) {
for (int j = setengahTinggi; j > i; j--) {
System.out.print(" ");
}
for (int k = 1; k <= l; k++) {
if (k == 1 || k == l) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
l += 2;
System.out.println();
}
l -= 2;
for (int i = 0; i < setengahTinggi; i++) {
for (int j = 0; j <= i; j++) {
System.out.print(" ");
}
for (int j = l; j > 0; j--) {
if (j == 1 || j == l) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
l -= 2;
System.out.println();
}
} else {
setengahTinggi = (tinggi / 2);
for (int i = 0; i < setengahTinggi; i++) {
for (int j = setengahTinggi; j >= i; j--) {
System.out.print(" ");
}
for (int k = 1; k <= l; k++) {
if (k == 1 || k == l) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
l += 2;
System.out.println();
}
for (int i = 0; i < tinggi-setengahTinggi; i++) {
for (int j = 0; j <= i; j++) {
System.out.print(" ");
}
for (int j = l; j > 0; j--) {
if (j == l || j == 1) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
l -= 2;
System.out.println();
}
}
}
}

>> Outputnya..