package javaapplication1;

/**
 *
 * @author HP
 */
public class quis {
    public static void main(String args[]){
        String a,b,c,d;
    a="indonesia tanah air beta";
    b="pusaka abadi nan jaya";
    c="indonesia sejak dulu kala";
    d="tetap di puja-puja bangsa";
    a=a.replace("indonesia", "Indonesia");
    b=b.replace("pusaka", "Pusaka");
    c=c.replace("indonesia", "Indonesia");
    d=d.replace("tetap", "Tetap");
        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
        System.out.println(d);

    }
    }

package javaapplication1;

/**
 *
 * @author HP
 */
public class ratarata {
    public static void main(String args[]){
        int bil1 = 10;
        int bil2 = 20;
        int bil3 = 45;
        int bil4 = 65;
        System.out.println("number 1 = "+bil1);
        System.out.println("number 2 = "+bil2);
        System.out.println("number 3 = "+bil3);
        System.out.println("number 4 = "+bil4);
        System.out.println("Rata-rata = "+(bil1+bil2+bil3+bil4)/4);
    }
}

package javaapplication1;

/**
 *
 * @author HP
 */
public class NewClass4 {
public static int [] doSelectionSort(int [] arr){
for(int i=0;i<arr.length-1;i++){
    int index = i;
    for (int j=i+1;j<arr.length;j++)
        if(arr[j]<arr[index])
        index=j;
    int smallerNumber= arr[index];
    arr [index]=arr[i];
    arr[i]=smallerNumber;
   }
    return arr;
  }
public static void main(String a[]){
int [] arr1={3, 13, 9, 10, 15};
int [] arr2= doSelectionSort(arr1);
for (int i:arr2){
    System.out.print(i);
    System.out.println(",");
}
}
 }

package javaapplication1;

import java.util.Arrays;

/**
 *
 * @author HP
 */
public class NewClass1 {
public static void main (String [] kukuh){
 int data [] = {12, 9, 25, 1, 7};
 Arrays.sort(data);
 for(int c: data){
     System.out.println(c);
  }
 }
}

LowCase and UpperCase

Ini gaes buat kalian yang ingin belajar progam java lowcase dan uppercase, semoga bermanfaat :D


package javaapplication1;

/**
 *
 * @author HP
 */
public class lowup {
    public static void main(String args[]){
       String str="Kukuh Fajar Nurillah";
       String lowerCaseStr=str.toLowerCase();
       String upperCaseStr=str.toUpperCase();
       System.out.println("str=" + str);
       System.out.println("lowerCaseStr=" + lowerCaseStr);
       System.out.println("upperCaseStr=" + upperCaseStr);
    }
}

Kayak gini gaes hasilnya :D
Gimana min minta comment nya ya hihihi :D

SWITCH CASE (pilihan)

import javax.swing.JOptionPane;

/**
 *
 * @author HP
 */
public class Switchcase {
    public static void main(String args[]){
        String pilihan=JOptionPane.showInputDialog("merk:\n1.NIKE\n2.ADIDAS\n3.PREDATOR\n4.PUMA\n5.NEW BALANCE");
        int merk=Integer.parseInt(pilihan);
        switch (merk){
            case 1:System.out.println("pilih NIKE");
            break;
            case 2: System.out.println("pilih ADIDAS");
            break;
            case 3: System.out.println("pilih PREDATOR");
            break;
            case 4: System.out.println("pilih PUMA");
            break;
            case 5: System.out.println("pilih NEW BALANCE");

        }
    }
}

Setelah di run file maka akan muncul gambar sebagai berikut, ketikkan no yang kamu pilih, lalu ok

dan hasilnya akan seperti gambar dibawah ini :