CoderJava

// Using Singleton on Kotlin
public object MySingleton {
  
  public fun foo() {
  }
  
}

// And use it on Kotlin
MySingleton.foo()

CoderJava

package id.bitcase.ocafe.utility;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.util.Log;

import java.io.IOException;

CoderJava

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

CoderJava

public class SerializationHelper {   
    public static byte[] serialize(Object object) throws IOException{
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
        // transform object to stream and then to a byte array
        objectOutputStream.writeObject(object);
        objectOutputStream.flush();
        objectOutputStream.close();
        return byteArrayOutputStream.toByteArray();
    }

CoderJava

{
  "nama": "Yudi Setiawan",
  "hobi": [
    "menulis",
    "membaca",
    "bersepeda"
  ],
  "usia": 23
}

CoderJava

{
  "nama": "Yudi Setiawan",
  "hobi": [
    "menulis",
    "membaca",
    "bersepeda"
  ],
  "usia": 23,
  "orang_tua": {
    "ibu": {

CoderJava

[
  {
    "string": "Ini String",
    "number": 1,
    "boolean": false,
    "array": []
  }
]

CoderJava

{
  "nama_depan": "Yudi",
  "nama_belakang": "Setiawan"
}

CoderJava

{
  "long": 10,
  "double": 10.5
}

CoderJava

{
  "isMan": true,
  "isWoman": false
}