Menghitung Luas Bidang Menggunakan Java (Pemrograman Berbasis Objek)

Jonmun Putra Siregar dan Ahmad Septisumargi  (http://ahmadseptisumargi-home.blogspot.com)

import java.io.*;
public class InputMenu {
public static void main(String args[]) throws IOException {
BufferedReader menu=new BufferedReader(new InputStreamReader (System.in));
int pilih;
do {
System.out.println("+++++++++++++++++++++++++++++++++++++");
System.out.println("+-------------MENU LUAS-------------+");
System.out.println("+++++++++++++++++++++++++++++++++++++");
System.out.println("+ 1. Lingkaran +");
System.out.println("+ 2. Persegi Panjang +");
System.out.println("+ 3. Persegi +");
System.out.println("+ 4. Segitiga +");
System.out.println("+ 5. EXIT +");
System.out.println("+===================================+");
System.out.print(" PILIHAN : ");
pilih=Integer.parseInt(menu.readLine());
System.out.println("+++++++++++++++++++++++++++++++++++++");


}
while (pilih<1 || pilih >5);

if(pilih==1) {
System.out.println("===== Lingkaran =====");
BufferedReader data=new BufferedReader(new InputStreamReader(System.in));
System.out.print("jari-jari : ");
int a=Integer.parseInt(data.readLine());
System.out.println("Luas = "+((a*a)*22/7));
}
if(pilih==2) {
System.out.println("===== Persegi Panjang =====");
BufferedReader data=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Panjang : ");
int b=Integer.parseInt(data.readLine());
System.out.print("Lebar : ");
int c=Integer.parseInt(data.readLine());
System.out.println("Luas = "+(b*c));
}
if(pilih==3) {
System.out.println("===== Persegi =====");
BufferedReader data=new BufferedReader(new InputStreamReader (System.in));
System.out.print("sisi : ");
int d=Integer.parseInt(data.readLine());
System.out.println(" Luas = "+(d*d));
}
if(pilih==4) {
System.out.println("===== Segitiga =====");
BufferedReader data=new BufferedReader(new InputStreamReader (System.in));
System.out.print("alas : ");
int e=Integer.parseInt(data.readLine());
System.out.print("tinggi : ");
int f=Integer.parseInt(data.readLine());
System.out.println(" Luas = "+((e*f)/2));
}
else if(pilih==5) {
System.out.println("Anda Memilih keluar ");
System.exit(0);
}}}