data mahasiswa

Mahasiswa2.java

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import java.io.*;




class Mahasiswa2{

String nim,nama;




void setNIM(String nim){

this.nim = nim;

}




void setNama(String nama){

this.nama = nama;

}




String getNIM(){

return nim;

}




String getNama(){

return nama;

}




void simpan(){

FileWriter fw = null;

try {

fw = new FileWriter("Mahasiswa.txt",true);

fw.write(nim +";" + nama +"\r\n");

}catch (Exception ex) {

System.out.println("Tidak dapat menyimpan data ke dalam file");

} finally {

if (fw !=null){

try {

fw.close();

} catch (Exception ex) {}

}

}

}




boolean baca(int noRecord){

FileReader fr = null;

String data = "";

boolean ada = true;




try{

fr = FileReader("Mahasiswa.txt");

br = BufferedReader(fr);

int no = 0;

while ((no++ <= noRecord) && ((data = br.readLine()) != null));

} catch (Exception ex) {

System.out.println("Tidak dapat membaca data");

} finally {

if (fr !=null) {

try {

fr.close();

}catch (Exception ex) {}

}

}




if ((data == null) || (data.equals(""))) ada = false;




if (ada) {

String nimTmp = "";

int i=0;

while ((i < data.length()) && (data.charAt(i) != ';')) {

nimTmp = nimTmp + data.substring(i, i+1);

i++;

}




nim = nimTmp;

nama = data.substring(i+1, data.length());

}




return ada;

}

}




========================================================================

DataMahasiswa.java

========================================================================



import java.util.Scanner;




class DataMahasiswa {

public static void main(String args[]){

Scanner baca = new Scanner (System.in);

Mahasiswa mahasiswa = new Mahasiswa();




int pilih = -1;

String intNim, intNama;




do {

System.out.println("Menu pilihan :");

System.out.println("1. Menyimpan Data");

System.out.println("2. Menampilkan Data");

System.out.println("0. Selesai");

System.out.println("Menu dipilih :"); pilih = baca.nextInt();




System.out.println("");

switch (pilih){

case 0: System.out.println("Selesai"); break;

case 1: System.out.println("Ketik data yang akan disimpan");

System.out.println("NIM :"); inNim = baca.nextLine();

inNim = baca.nextLine();

System.out.println("Nama :"); inNama = baca.nextLine();




mahasiswa.setNim(inNim);

mahasiswa.setNama(inNama);

mahasiswa.simpan();

break;




case 2: System.out.println("Data yang tersimpan adalah:");

int i=0;

while (mahasiswa.baca(i++)) {

System.out.println("Data ke-"+i);

System.out.println("NIM : "+mahasiswa.getNim());

System.out.println("Nama : "+mahasiswa.getNama());

}

break;

default: System.out.println("Menu yang dipilih tidak terdaftar");

}




System.out.println();

}while (ppilih != 0);

}

}

}