Semua kodingan java per materi kuliah

jsx_array.java

/**
 * Write a description of class jsx_array here.
 *
 * @author (Cahya Dyazin)
 * @version (0.1 13/06/2017)
 */
public class jsx_array
{
     public static void main (String args []){
         int nilai[] = new int[3];
         
         nilai[0]=70;
         nilai[1]=80;
         nilai[2]=65;
      
         for(int i=0; i < nilai.length;i++)
            System.out.println("indeks ke-"+i+" = " +nilai[i]);
     }
}

jsx_array2D.java

/**
 * Write a description of class jsx_array2D here.
 *
 * @author (Cahya Dyazin)
 * @version (0.1 13/06/2017)
 */
public class jsx_array2D
{
    public static void main(String[] args) {
    
        // membuat isi elemen array
        String [][] nama_bunga = {
            {"No","Bunga"},
            {"1.","Anggrek"},
            {"2.","Mawar"},
            {"3.","Melati"},
            {"4.","Tulip"}
        };
 
        int i, j; // i = baris v, j = kolom >
        
        for ( i=0; i<5; i++)
        {
            for ( j=0; j<2; j++)
            {
                // menampilkan isi elemen baris dan kolom
                System.out.print(nama_bunga[i][j]+" ");  
            }
            System.out.println("");
        }//pindah baris
    }
}

jsx_array_dynamic.java

/**
 * Write a description of class jsx_array_dynamic here.
 *
 * @author (Cahya Dyazin)
 * @version (0.1 13/06/2017)
 */

import java.util.Scanner;

public class jsx_array_dynamic
{
    public static void main(String args [])
    {
        System.out.println("Masukan jumlah array yang kamu inginkan ?");
        Scanner a = new Scanner(System.in);
        int total_array = a.nextInt();
        
        System.out.println("");
        System.out.println("");
        
        String container_array[] = new String[total_array];
        
        System.out.println("=================================================");
        System.out.println("Hello, Data array yang harus kamu masukan ada "+ total_array);
        System.out.println("=================================================");
        for(int i=0; i<total_array; i++)
        {
            System.out.println("Masukan nilai untuk array ke-"+ i);
            Scanner b = new Scanner(System.in);
            String nilai_array = b.nextLine();
            
            container_array[i]= nilai_array;
            
            System.out.print(" --berhasil disimpan");
            System.out.println("");
            System.out.println("");
        }
        
        System.out.println("==============================================");
        System.out.println("Berikut adalah data array yang telah tersimpan");
        System.out.println("==============================================");
        for(int j=0; j<total_array; j++)
        {
            int ai = j+1;
            System.out.println(ai +". Nilai array ke-"+ j +" adalah "+ container_array[j]);
        }
    }
}

tugas1.java

/**
 * Write a description of class tugas1 here.
 * Hal 16 No.4 (include fungsi IF)
 *
 * @author (Cahya Dyazin)
 * @version (11/07/2017)
 */

import java.util.Scanner;

public class tugas1 
{ 
    public static void main( String[] cahya ){ 

      Scanner dataIn = new Scanner(System.in); 

      String name = ""; 
      String a = "cahya";
      
      System.out.print("Tolong masukan nama kamu:"); 
      name = dataIn.nextLine();

      if (name.equals(a)){
          System.out.println("Uhuk-uhuk, selamat "+name+" kamu lulus :)"); 
      }
   } 
}

tugas2.java

/**
 * Write a description of class tugas2 here.
 * Hal 18 No.4 (pakai fungsi pengulangan for, while, do while)
 *
 * @author (Cahya Dyazin)
 * @version (11/07/2017)
 */

import java.util.Scanner;

public class tugas2 
{ 
    public static void main( String[] cahya ){ 

      double nilai;
      int i;
      
      Scanner dataIn = new Scanner(System.in); 
      for(i=1; i<=6; i++)
      {
          System.out.println("Masukan nilai mahasiswa "+ i +": ");
          nilai = dataIn.nextDouble();
          
          if(nilai >= 9)
          {
              System.out.println("--nilai A+");
          }
          else if(nilai < 9 && nilai >= 8)
          {
              System.out.println("--nilai A");
          }
          else if(nilai < 8 && nilai >= 7)
          {
              System.out.println("--nilai B");
          }
          else if(nilai < 7 && nilai >= 6)
          {
              System.out.println("--nilai C");
          }
          else if(nilai < 6 && nilai >= 5)
          {
              System.out.println("--nilai D");
          }
          else
          {
              System.out.println("Nilai terlalu jelek, kami turut prihatin!");
          }
      }
   } 
}