Kodingan :

import javax.swing.JOptionPane;
public class Nilai{
  public static void main( String[] args ){
    String a= "";
    String b= "";
    String c= "";
    a= JOptionPane.showInputDialog("Input Nilai Pertama");
    int n1= Integer.valueOf(a).intValue();
    b= JOptionPane.showInputDialog("Input Nilai Kedua");
    int n2= Integer.valueOf(b).intValue();
    c= JOptionPane.showInputDialog("Input Nilai Ketiga");
    int n3= Integer.valueOf(c).intValue();
    int rata=(n1+n2+n3)/3;
    String hasil = "";
    hasil += "Nilai Pertama   :" + n1 + "\n";
    hasil += "Nilai Kedua     :" + n2 + "\n";
    hasil += "Nilai Ketiga    :" + n3 + "\n";
    hasil += "Rata-Rata nilai :" + rata + "\n";
    if (rata>=60){
        hasil +="Good :)"+"\n";
    }
    else{
        hasil +=":("+"\n";
    }
    JOptionPane.showMessageDialog(null, hasil);
  }
}


Output :

Kodingan :

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class KataTerakhir_BufferedReader {
  public static void main( String[] args ){
    BufferedReader dataIn = new BufferedReader(new
InputStreamReader( System.in) );
    String word1 = "";
    System.out.print("Enter Word 1 :");
    try{
      word1 = dataIn.readLine();
    }catch( IOException e ){
      System.out.println("Error!");
    }
    String word2 = "";
    System.out.print("Enter Word 2 :");
    try{
      word2 = dataIn.readLine();
    }catch( IOException e ){
      System.out.println("Error!");
    }
     String word3 = "";
    System.out.print("Enter Word 3 :");
    try{
      word3 = dataIn.readLine();
    }catch( IOException e ){
      System.out.println("Error!");
    }
    System.out.println(word1 + " " + word2 + " " + word3 );
  }
}

Output :

class ArrayDuaDimensi{
public static void main (String[] args)
{
int[][] angka = new int[5][3];
for (int i=0; i<angka.length; i++)
for (int j=0; j<angka[i].length; j++)
angka[i][j] = (int)(Math.random()*100);
System.out.println("Data array dua dimensi:\n");
for (int i=0; i<angka.length; i++)
{
for (int j=0; j<angka[i].length; j++)
System.out.print(angka[i][j] + " ");
System.out.println();
}}}

Output :

import javax.swing.JOptionPane;
public class JOption{
  public static void main( String[] args ){
    String name = "";
    String npm = "";
    String kelas = "";
    name = JOptionPane.showInputDialog("Please enter your name");
    npm = JOptionPane.showInputDialog("Please enter your npm");
    kelas = JOptionPane.showInputDialog("Please enter your kelas");
    String msg = "Hello " + name + "! " + "Your NPM is " + npm + ", and Your Class is " + kelas + "!";
    JOptionPane.showMessageDialog(null, msg);
  }
}

Output :