solanoize · November 4, 2025 14:42 · solanoize · Nov 4, 2025
diff --git a/App_Day02Batch25A1.java b/App_Day02Batch25A1.java
 package com.juaracoding.labs;


 public class App {
    public static void main(String[] args) {
      /**
       * Implicit casting (casting otomatis)
       */
      // int i = 124_000_000; // kapasitas int di i, ukurannya lebih kecil dari kapasitas long di l.
      // long l = i;

      // System.out.println(i);
      // System.out.println(l);

      // /**
      //  * Explicit casting
      //  */
      // short s = 100;
      // byte b = (byte) s;
      // System.out.println(s);
      // System.out.println(b);

      // int num1 = 10;
      // int num2 = 20;
      // double num3 = num1 / (double) num2;
      // System.out.println(num3);

      // int num4 = num1%3;
      // System.out.println(num4);

      // increment
      // int x = 10;
      // System.out.println(x++); // Pakai Dulu x nya, Baru Tambah x nya dengan 1

      // int c = 1;
      // System.out.println(++c); // Tambah dulu c nya, baru pakai (cetak)
      // System.out.println(x);

      int total = 140_000;
      double discount = (double) 10/100;
      double hargaPotongan = total * discount;
      double hargaBayar = total - hargaPotongan;
      System.out.println(hargaBayar);
    }
 }
diff --git a/App_Day02Batch25A2.java b/App_Day02Batch25A2.java
 package com.juaracoding.labs;

 import java.util.Scanner;
 import java.util.concurrent.ThreadLocalRandom;

 public class App {

  public static int getRandomPrice() {
    int hargaAwalAcak = ThreadLocalRandom.current().nextInt(100, 1000);
    int hargaBulatPasti = hargaAwalAcak * 1000;
    return hargaBulatPasti;
  }

    public static void main(String[] args) {
      int hargaTotal = getRandomPrice();
      
      Scanner scanner = new Scanner(System.in);

      System.out.println("Harga Total: " + hargaTotal);

      // input nama pelanggan
      System.out.print("Masukkan nama: ");
      String namaCustomer = scanner.nextLine();
      System.out.println("Nama pelanggan adalah " + namaCustomer);

      // input diskon
      System.out.print("Masukkan diskon: ");
      double diskon = scanner.nextDouble();
      diskon = diskon / 100;
      double hargaPotongan = hargaTotal * diskon;
      System.out.println("Diskon " + (diskon * 100) + "%");
      System.out.println("Harga diskon : " + hargaPotongan);

      double hargaBayar = hargaTotal - hargaPotongan;
      System.out.println("Perlu di bayar = " + hargaBayar);

    }
 }
diff --git a/App_Day02Batch25A3.java b/App_Day02Batch25A3.java
 package com.juaracoding.labs;

 import java.util.Scanner;

 public class App {

  public static void main(String[] args) throws Exception {
    String dbEmail = "[email protected]";
    String dbPassword = "c4y4nkc3l4loe";

    Scanner scanner = new Scanner(System.in);

    System.out.println("Login here...");
    
    System.out.print("email \t\t: ");
    String email = scanner.nextLine();

    System.out.print("password \t: ");
    String password = scanner.nextLine();

    boolean hasil = email.equals(dbEmail) && password.equals(dbPassword);
    
    if (hasil) {
      System.out.println("Test success");
    } else {
      throw new Exception("Testing gagal!");
    }
  }
 }
diff --git a/App_Day03Batch25A1.java b/App_Day03Batch25A1.java
 package com.juaracoding.labs;


 public class App {

  public static void main(String[] args) throws Exception {
    int harga = 10000;
    int uang = 5000;

    if (uang >= harga) {
      System.out.println("Saya bisa beli produk tersebut");
    } else {
      System.out.println("Saya tidak bisa beli produk tersebut");
    }

    System.out.println("Ini perintah berikutnya.");

    String validUsername = "uus";
    String validPassword = "123qwe";

    String usernameDariUser = "oncom";
    String passwordDariUser = "123qwa";

    if (usernameDariUser.equals(validUsername) && passwordDariUser.equals(validPassword)) {
      System.out.println("Login berhasil.");
    } else {
      System.out.println("Login gagal.");
    }
  }
 }
diff --git a/App_Day03Batch25A2.java b/App_Day03Batch25A2.java
 package com.juaracoding.labs;

 import java.util.InputMismatchException;
 import java.util.Scanner;

 public class App {

  public static void main(String[] args) throws Exception {
    Scanner scanner = new Scanner(System.in);

    try {
      System.out.print("Masukkan nilai peserta: ");
      int nilaiPeserta = scanner.nextInt();

      if (nilaiPeserta == 0) {
        System.out.println("Nilai peserta tidak boleh kosong");
      } else {
        int nilaiA = 90;
        int nilaiB = 83;
        int nilaiC = 70;
        int nilaiD = 60;
        
        if (nilaiPeserta >= nilaiA) {
          System.out.println("Dapet A");
        } else if (nilaiPeserta >= nilaiB) {
          System.out.println("Dapet B");
        } else if (nilaiPeserta >= nilaiC) {
          System.out.println("Dapet C");
        } else if (nilaiPeserta >= nilaiD) {
          System.out.println("Dapet D");
        } else {
          System.out.println("Dapet E");
        }
      }
    } catch (InputMismatchException e) {
      System.out.println("Ups terjadi masalah!");
      System.out.println(e.getMessage());
    }
  }
 }
diff --git a/App_Day03Batch25A3.java b/App_Day03Batch25A3.java
 package com.juaracoding.labs;

 public class App {
  public static void main(String[] args) throws Exception {
    int today = 3;
    String task = "";

    switch (today) {
      case 1:
      case 2:
        task = "Development";
        break;
      case 3:
      case 4:
        task = "QA Test";
        break;
      case 5:
        task = "Deployment";
        break;
      case 6:
      case 7:
        task = "Nothing";
        break;
      default:
        task = "Invalid Task";
        break;
    }

    System.out.println(task);
  }
 }
diff --git a/App_Day03Batch25A4.java b/App_Day03Batch25A4.java
 package com.juaracoding.labs;

 public class App {
  public static void main(String[] args) throws Exception {
    String namaDepan = "Budi";
    String namaBelakang = "Andika";
    String gelar = "M.Kom";

    String namaLengkap = namaDepan.concat(" ").concat(namaBelakang).concat(", ").concat(gelar);
    System.out.println(namaLengkap);

    String namaPelanggan = "Citra Lestari";
        String item = "Kopi Robusta 500gr";
        int jumlah = 2;
        int hargaSatuan = 120_000;
        int total = jumlah * hargaSatuan;

        // Pakai Text Blocks (tanda kutip tiga kali) + .formatted()
        String struk = """
            ==================================
                 MINI MARKET JAYA ABADI
            ==================================
            Pelanggan : %s
            
            Item      : %s
            Jumlah    : %d
            Harga     : Rp %,d
            ----------------------------------
            TOTAL     : Rp %,d
            
            Terima kasih!
            ==================================
            """.formatted(namaPelanggan, 
                          item, 
                          jumlah, 
                          hargaSatuan, 
                          total);

        System.out.println(struk);
  }
 }
diff --git a/App_Day03Batch25A5.java b/App_Day03Batch25A5.java
 package com.juaracoding.labs;

 public class App {
  public static void main(String[] args) throws Exception {
    for (int i = 1; i <= 5; i++) {
        int jumlah = 2;
        int hargaSatuan = 120_000 * i;
        int total = jumlah * hargaSatuan;

        String struk = """
            ==================================
                 MINI MARKET JAYA ABADI
            ==================================
            Nomor Transaksi: TRX%04d

            No. Pelanggan : CST%04d
            
            Jumlah    : %d
            Harga     : Rp %,d
            ----------------------------------
            TOTAL     : Rp %,d
            
            Terima kasih!
            ==================================
            """.formatted(i, i, i, hargaSatuan, total);
        System.out.println(struk);
          
    }
  }
 }
  

diff --git a/App_Day03Batch25A6.java b/App_Day03Batch25A6.java
 package com.juaracoding.labs;

 public class App {
  public static void main(String[] args) throws Exception {
    // int i = 1;
    // while (i <= 5) {
    //   System.out.println(i);
    //   i++;
    // }

    // do {
    //   System.out.println("Ini dari do while, jalan dulu, dicek belakangan!");
    //   i++;
    // } while(i <= 5);

    // int i = 0;
    // while (true) {
    //   System.out.println(i);
    //   i++;
    //   if (i > 5) {
    //     break;
    //   }

    // }

    int i = 0;

    while (i <= 10) {
      i++;
      if (i % 2 != 0) {
        continue;
      }
      System.out.println(i);
    }
  }
 }
  

diff --git a/App_Day03Batch25A6_GameGuntingBatuKertas.java b/App_Day03Batch25A6_GameGuntingBatuKertas.java
 package com.juaracoding.labs;

 import java.util.Scanner;
 import java.util.concurrent.ThreadLocalRandom;

 public class App {
  public static void main(String[] args) throws Exception {
    Scanner scanner = new Scanner(System.in);
    // --- Setup Variabel ---
    int KERTAS = 0;
    int GUNTING = 1;
    int BATU = 2;

    System.out.print("Masukkan angka: (0) Kertas, (1) Gunting, (2) Batu \t");
    int playerChoice = scanner.nextInt(); // Input dari Anda (GUNTING)

    // Kita acak pilihan komputer (0, 1, atau 2)
    int computerChoice = ThreadLocalRandom.current().nextInt(0, 3);

    // Konversi angka ke teks agar mudah dibaca
    String[] pilihanTeks = {
      "Kertas",
      "Gunting",
      "Batu"
    };

    System.out.println("Player memilih: " + pilihanTeks[playerChoice]);
    System.out.println("Komputer memilih: " + pilihanTeks[computerChoice]);
    System.out.println("---");

    if (playerChoice == computerChoice) {
      System.out.println("Hasil 2: SERI!");
    } else if (playerChoice == (computerChoice + 1) % 3) {
      System.out.println("Hasil 2: Player MENANG!");
    } else {
      System.out.println("Hasil 2: Player KALAH!");
    }


  }
 }
diff --git a/rekap.md b/rekap.md
	package com.juaracoding.labs;


	public class App {
	public static void main(String[] args) {
	/**
	* Implicit casting (casting otomatis)
	*/
	// int i = 124_000_000; // kapasitas int di i, ukurannya lebih kecil dari kapasitas long di l.
	// long l = i;

	// System.out.println(i);
	// System.out.println(l);

	// /**
	// * Explicit casting
	// */
	// short s = 100;
	// byte b = (byte) s;
	// System.out.println(s);
	// System.out.println(b);

	// int num1 = 10;
	// int num2 = 20;
	// double num3 = num1 / (double) num2;
	// System.out.println(num3);

	// int num4 = num1%3;
	// System.out.println(num4);

	// increment
	// int x = 10;
	// System.out.println(x++); // Pakai Dulu x nya, Baru Tambah x nya dengan 1

	// int c = 1;
	// System.out.println(++c); // Tambah dulu c nya, baru pakai (cetak)
	// System.out.println(x);

	int total = 140_000;
	double discount = (double) 10/100;
	double hargaPotongan = total * discount;
	double hargaBayar = total - hargaPotongan;
	System.out.println(hargaBayar);
	}
	}
	package com.juaracoding.labs;

	import java.util.Scanner;
	import java.util.concurrent.ThreadLocalRandom;

	public class App {

	public static int getRandomPrice() {
	int hargaAwalAcak = ThreadLocalRandom.current().nextInt(100, 1000);
	int hargaBulatPasti = hargaAwalAcak * 1000;
	return hargaBulatPasti;
	}

	public static void main(String[] args) {
	int hargaTotal = getRandomPrice();

	Scanner scanner = new Scanner(System.in);

	System.out.println("Harga Total: " + hargaTotal);

	// input nama pelanggan
	System.out.print("Masukkan nama: ");
	String namaCustomer = scanner.nextLine();
	System.out.println("Nama pelanggan adalah " + namaCustomer);

	// input diskon
	System.out.print("Masukkan diskon: ");
	double diskon = scanner.nextDouble();
	diskon = diskon / 100;
	double hargaPotongan = hargaTotal * diskon;
	System.out.println("Diskon " + (diskon * 100) + "%");
	System.out.println("Harga diskon : " + hargaPotongan);

	double hargaBayar = hargaTotal - hargaPotongan;
	System.out.println("Perlu di bayar = " + hargaBayar);

	}
	}
	package com.juaracoding.labs;


	public class App {

	public static void main(String[] args) throws Exception {
	int harga = 10000;
	int uang = 5000;

	if (uang >= harga) {
	System.out.println("Saya bisa beli produk tersebut");
	} else {
	System.out.println("Saya tidak bisa beli produk tersebut");
	}

	System.out.println("Ini perintah berikutnya.");

	String validUsername = "uus";
	String validPassword = "123qwe";

	String usernameDariUser = "oncom";
	String passwordDariUser = "123qwa";

	if (usernameDariUser.equals(validUsername) && passwordDariUser.equals(validPassword)) {
	System.out.println("Login berhasil.");
	} else {
	System.out.println("Login gagal.");
	}
	}
	}
	package com.juaracoding.labs;

	import java.util.InputMismatchException;
	import java.util.Scanner;

	public class App {

	public static void main(String[] args) throws Exception {
	Scanner scanner = new Scanner(System.in);

	try {
	System.out.print("Masukkan nilai peserta: ");
	int nilaiPeserta = scanner.nextInt();

	if (nilaiPeserta == 0) {
	System.out.println("Nilai peserta tidak boleh kosong");
	} else {
	int nilaiA = 90;
	int nilaiB = 83;
	int nilaiC = 70;
	int nilaiD = 60;

	if (nilaiPeserta >= nilaiA) {
	System.out.println("Dapet A");
	} else if (nilaiPeserta >= nilaiB) {
	System.out.println("Dapet B");
	} else if (nilaiPeserta >= nilaiC) {
	System.out.println("Dapet C");
	} else if (nilaiPeserta >= nilaiD) {
	System.out.println("Dapet D");
	} else {
	System.out.println("Dapet E");
	}
	}
	} catch (InputMismatchException e) {
	System.out.println("Ups terjadi masalah!");
	System.out.println(e.getMessage());
	}
	}
	}
Specifier	Tipe Data	Contoh Input	Contoh Output
`%s`	String	`"Budi"`	`"Budi"`
`%d`	Integer (int, long)	`123`	`"123"`
`%f`	Desimal (double, float)	`12.345`	`"12.345000"` (default 6 desimal)
`%b`	Boolean	`true`	`"true"`
`%c`	Character	`'A'`	`"A"`
`%n`	(Tidak ada)	(pindah baris)	`(baris baru)`
`%%`	(Tidak ada)	(untuk nulis %)	`"%"`
Modifikasi	Arti	Contoh Kode	Contoh Output
`,` (Koma)	Pemisah Ribuan (Ini yang Anda pakai)	`"%,d".formatted(1000000)`	`"1,000,000"`
`.N` (Presisi)	Ambil N Angka Desimal (Otomatis membulatkan)	`"%.2f".formatted(12.34567)`	`"12.35"`
`[Angka]` (Width)	Lebar Minimum Karakter (Default: rata kanan)	`"%10d".formatted(123)`	`" 123"` (Total 10 char)
`-` (Minus)	Rata Kiri (Gabungkan dengan width)	`"%-10s".formatted("Budi")`	`"Budi "` (Total 10 char)
`0` (Nol)	Zero-Padding (Isi spasi kosong dengan 0)	`"%08d".formatted(123)`	`"00000123"` (Total 8 char)
`+` (Plus)	Selalu Tampilkan Tanda (Positif atau Negatif)	`"%+d".formatted(123)`	`"+123"`
Kebutuhan	Format	Contoh Input	Contoh Output
Uang Rupiah (Ribuan + 0 Desimal)	`"Rp %,.0f"`	`1234500.75`	`"Rp 1,234,501"`
Uang Dolar (Ribuan + 2 Desimal)	`"$ %,.2f"`	`1234500.75`	`"$ 1,234,500.75"`
Kolom Tabel Rata Kiri	`"	%-15s	"`
Kolom Angka Rata Kanan	`"	%10d	"`
Nomor Seri / ID (Panjang 5 digit, isi 0)	`"%05d"`	`42`	`"00042"`