ADT mahasiswa (sederhana)

class Mahasiswa {
    
    private int flag = 0;
    private int[] nim;
    private String[] nama;
    
    public Mahasiswa(int size) {
        this.nim = new int[size];
        this.nama = new String[size];
    }
    
    public void set(int nim, String nama) {
        this.nim[flag] = nim;
        this.nama[flag] = nama;
        
        flag++;
    }
    
    public String get(int nim) {
        for(int i=0; i<this.nim.length; i++) {
            if(this.nim[i] == nim) return this.nama[i];
        }
        return null;
    }
}

class Main {
    
    public static void main(String[] args) {
        Mahasiswa mhs = new Mahasiswa(2);
        mhs.set(112233, "Adi");
        mhs.set(223344, "Budi");
        
        System.out.println(mhs.get(112233));
    }
}