schedulemingguan

import java.io.*;
import java.util.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

private Hashtable jadwalMingguan;

public Main(){
 this.jadwalMingguan = new Hashtable();
 }



public void tambah(String name, String activity){
 if(this.jadwalMingguan.containsKey(activity)){
 System.out.println(name+ " sudah ditambahkan.");
 } else {
 this.jadwalMingguan.put(name, activity);
 System.out.println(name+" berhasil ditambahkan.");
 }
 }

public void cari (String activity){
 if(this.jadwalMingguan.containsKey(activity)){
 String name = (String) this.jadwalMingguan.get(activity);
 System.out.println("Aktivitas "+activity+" minggu ini "+name+".");
 } else {
 System.out.println(activity+" Tidak ditemukan.");
 }
 }

public void status(){
 Enumeration names;
 names = this.jadwalMingguan.keys();
 int total = 0;
 while(names.hasMoreElements()) {
 String str = (String) names.nextElement();
 System.out.println(str + " aktivitas minggu ini yaitu " + this.jadwalMingguan.get(str));
 total++;
 }
 System.out.println("Total aktivitas minggu ini "+total);
 }

public void hapus_entry(String activity){
 if(this.jadwalMingguan.containsKey(activity)){
 this.jadwalMingguan.remove(activity);
 System.out.println(activity+" berhasil dihapus.");
 } else {
 System.out.println(activity+" tidak ditemukan.");
 }
 }

public static void main(String[] args ) throws IOException {

String name;
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br =new BufferedReader(isr);

Scanner scanner = new Scanner(System.in);
Main jadwalMingguan = new Main();

while(true){
    System.out.print("\n-Program Schedule Mingguan-\n");
    System.out.print("Pilih Kategori\n");
    System.out.print("1. Tambah Aktivitas Mingguan \n");
    System.out.print("2. Cari Aktivitas di Minggu ini \n");
    System.out.print("3. Status \n");
    System.out.print("4. Hapus Aktivitas \n");
    System.out.print("5. Keluar \n");
    System.out.print("Kategori ke : ");

int command = scanner.nextInt();

if(command==1){
    System.out.print("Nama      : ");
    String nama = br.readLine();
    System.out.print("Aktivitas : ");
    String activity = br.readLine();
    jadwalMingguan.tambah(activity, nama);
 }
 else if(command==2){
    System.out.print("Aktivitas : ");
    String activity = br.readLine();
    jadwalMingguan.cari(activity);
 }
 else if(command==3){
    jadwalMingguan.status();
 }
 else if(command==4){
    System.out.print("Aktivitas : ");
    String activity = br.readLine();
    jadwalMingguan.hapus_entry(activity);
 }
 else if(command==5){
 break;
 }
 }
 scanner.close();
 }
 }