Membuat menu menggunakan array

import java.util.Scanner;
public class Baru {
public static void main(String[] args){
Scanner input=new Scanner(System.in);
garis();
System.out.println(" MENU PILIHAN ");
garis();
System.out.println("1. Menhitung Nilai Mahasiswa");
System.out.println("");
System.out.println("2. Exit");
garis();
System.out.println("");
System.out.print("Anda pilih no :");
int pilih=input.nextInt();

switch(pilih){
case 1:{

int[] npm=new int[20];
String[] nama=new String[20];
String[] jur=new String[20];
String[] mk=new String[20];
int[] n_tgas=new int[20];
int[] n_uts=new int[20];
int[] n_uas=new int[20];


garis();
System.out.println(" MENGHITUNG NILAI MAHASISWA");
garis();
System.out.println("");
System.out.print("Masukan jumlah data ="); int n=input.nextInt();

for(int i=1;i<=n;i++){
System.out.println("Data ke"+i +":");
System.out.print("NPM :"); npm[i]=input.nextInt();
System.out.print("Nama :"); nama[i]=input.next();
System.out.print("Jurusan :"); jur[i]=input.next();
System.out.print("Mata Kuliah :"); mk[i]=input.next();
System.out.print("Nilai tugas :"); n_tgas[i]=input.nextInt();
System.out.print("Nilai UTS :"); n_uts[i]=input.nextInt();
System.out.print("Nilai UAS :"); n_uas[i]=input.nextInt();
double rata=(n_tgas[i]+n_uts[i]+n_uas[i])/3;
System.out.println("Nilai rata-rata ="+rata);

}
break;
}
default:System.exit(0);
}
}
static void garis(){
System.out.println("==========================================");
}
}

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