Kumpulan tugas JAVA bid, robi, iqbal, cahya (Semester 3)

array2dim2.java

/**
 * program array 2 dimensi
 *
 * @author (Cahya Dyazin)
 * @version (0.1 11/10/2017)
 */

import java.util.Scanner;

public class array2dim2 
{
    public static void main(String[] args)
    {
        System.out.print('\u000C');    
        int input_b, input_k, index;

        Scanner s = new Scanner(System.in);
        
        System.out.print("Masukan banyak baris: ");
        input_b = s.nextInt();

        System.out.print("Masukan banyak kolom: ");
        input_k = s.nextInt();

        String[][] z = new String[input_b][input_k];
        for(int k=0; k<input_b*input_k; k++)
        {
            System.out.print("Masukan nilai ke: ["+k/input_k+"]["+k%input_k+"]: ");
            z[k/input_k][k%input_k] = s.next();
        }

        for(int k=0; k<input_b*input_k; k++)
        {
            System.out.print(z[k/input_k][k%input_k]+"\t\t");
            
            if(k%input_k==input_k - 1)
            {
                System.out.println();
            }
        }
        
    }
}

no1.java

/**
 * program array 2 dimensi
 *
 * @author (Cahya, Robi, Iqbal, Budi)
 * @version (0.1 8/10/2017)
 */

public class no1
{
    public static void main(String [] args) 
    {    
        // membuat isi elemen array
        int [][] angka = {
            {0, 1, 2, 3, 4},
            {5, 6, 7, 8, 9},
            {10, 11, 12, 13, 14},
            {15, 16, 17, 18, 19}
        };
 
        int i, j; // i = baris v, j = kolom >
        
        for (i=0;i<4;i++)
        {
            for (j=0;j<5;j++)
            {
                // menampilkan isi elemen baris dan kolom
                System.out.print(angka[i][j]+" ");  
            }
            System.out.println("");
        }//pindah baris
    }
}

no2.java

/**
 * program substring
 *
 * @author (Cahya, Robi, Iqbal, Budi)
 * @version (0.1 8/10/2017)
 */

public class no2
{
    public static void main(String [] args) 
    {  
        String a = "Saya_adalah_String_a";

        /** 
        *   Dua method substring tersebut adalah sebagai berikut :
        *       1. substring(int beginIndex)
        *       2. substring(int beginIndex, int endIndex)
        *   Sebagai catatan "int beginIndex" dimulai dari 0 
        **/

        String b = a.substring(2);
        String c = a.substring(0, 2);

        System.out.println(b);
        System.out.println(c);
    }
}

no3.java

/**
 * program Hitung Nilai
 *
 * @author (Cahya, Robi, Iqbal, Budi)
 * @version (0.1 8/10/2017)
 */
 
import java.io.*;

public class no3
{
    public static void main(String [] args)
    {
        String a = "iniibubudi";
        String b = "123456789";

        // variabel C akan menghasilkan nilai 2345
        int c= Integer.parseInt(a.substring(1,5));

        // variabel D akan menghasilkan nilai 67
        int d= Integer.parseInt(a.substring(5,7));

        System.out.println(a.substring(1,5));

        // variabel C + D sama dengan 2345+67=2412
        System.out.println(c+d);
    }
}

no3new.java

import java.io.*;
import java.util.*;
public class no3new 
{
    public static void main(String[] args) throws IOException 
    {
        String filename;
        Scanner input = new Scanner(System.in);
        System.out.print("Masukkan nama file atau direktori");
        System.out.print(" atau tekan <Enter> untuk keluar:");
       filename = input.nextLine();
        while (!filename.equals("")) //menguji bukan <ENTER>
        {
            File fileDir = new File(filename);
            if (!fileDir.exists()) {
                System.out.println("Nama file tidak ada");
                break;
            }

            System.out.print(filename + " adalah suatu ");
            
            if (fileDir.isFile())
            {
                System.out.println("file.");
            } else {
                System.out.println("direktori.");
            }
            
            System.out.print("File/direktori ini ");

            if (!fileDir.canRead())
            {
                System.out.print("tidak ");
            }

            System.out.println("dapat dibaca.");
            System.out.print("File/direktori ini ");
            
            if (!fileDir.canWrite())
            {
                System.out.print("tidak ");
            }

            System.out.println("dapat ditulis.");

            if (fileDir.isDirectory()) 
            {
                System.out.println("Isi:");
                String[] fileList = fileDir.list();
                //tampilkan isi direktori
                for (int i = 0; i < fileList.length; i++)
                System.out.println(" " + fileList[i]);
            } else {
                System.out.print("Ukuran file: ");
                System.out.println(fileDir.length() + " bytes.");
            }
            canWrite
            System.out.print("Masukkan nama file atau direktori");
            System.out.print(" atau tekan <Enter> untuk keluar:");
            filename = input.nextLine();
        }
        input.close();
    }
}

no4.java

/**
 * program Volume Balok
 *
 * @author (Cahya, Robi, Iqbal, Budi)
 * @version (0.1 8/10/2017)
 */

import java.io.*;
public class no4
{ 
    public static void main(String[] args)
    { 
        String s;
        int p,l,t,volume;
        
        try
        { 
            FileReader fr = new FileReader("dataku.txt");
            BufferedReader br = new BufferedReader(fr);
            
            while((s=br.readLine()) != null)
            { 
                p = Integer.parseInt(s.substring(2,4));
                l = Integer.parseInt(s.substring(3,5));
                t = Integer.parseInt(s.substring(8,10));
                
                volume=p*l*t;
                
                System.out.printf("Panjang %i Lebar %i "+" Tinggi %i maka volume = %i\n", p,l,t,volume);
            }
            br.close();
        } 
        catch(IOException e) { 
            System.err.println("File read error"); 
        }
    }
}

no4new.java

//Aplikasi untuk mengcopy file
import java.io.*;
import java.util.*;
public class no4new 
{
    public static void main(String[] args) throws IOException 
    {
        //cek kedua nama file sudah diinput
        if (args.length < 2) 
        {
            System.out.println("Anda harus memasukkan dua nama file.");
            System.out.println("Syntax:");
            System.out.println(" java Copy <sumber> <tujuan>");
            return;
        }

        Scanner sumber = new Scanner(new File(args[0]));
        PrintWriter tujuan = new PrintWriter(new File(args[1]));

        String input;

        while (sumber.hasNext()) 
        {
            input = sumber.nextLine();
            tujuan.println(input);
        }
        sumber.close();
        tujuan.close();
     }
}