tugas java 2009==>constructor

untuk membuat seperti yang tampil di atas, buat dua file dibawah ini :
file 1 ==>tugas.java

class tugas
{
private int nabs1,ntgs1,nuts1,nuas1;
double na;

tugas(int a,int b,int c,int d)
{
nabs1=a;
ntgs1=b;
nuts1=c;
nuas1=d;
}

public double carina()
{
na=(0.1*nabs1)+(0.2*ntgs1)+(0.3*nuts1)+(0.4*nuas1);
return na;
}
}

file 2 ==>tugasact.java

import java.util.*;

class tugasact
{
public static void main(String[] r)
{
Scanner input=new Scanner(System.in);

String nim,nm;
int nabs,ntgs,nuts,nuas;

System.out.println("input");
System.out.print("Masukkan NIM = ");
nim=input.next();
System.out.print("Masukkan Nama = ");
nm=input.next();
System.out.print("Masukkan Nilai Absen = ");
nabs=input.nextInt();
System.out.print("Masukkan Nilai Tugas = ");
ntgs=input.nextInt();
System.out.print("Masukkan Nilai UTS = ");
nuts=input.nextInt();
System.out.print("Masukkan Nilai UAS = ");
nuas=input.nextInt();

tugas tugas=new tugas(nabs,ntgs,nuts,nuas);

System.out.println("\n\noutput

");

System.out.println("=========================");
System.out.println("NIM = "+nim);
System.out.println("Nama = "+nm);
System.out.println("Nilai Absen = "+nabs);
System.out.println("Nilai Tugas = "+ntgs);
System.out.println("Nilai UTS = "+nuts);
System.out.println("Nilai UAS = "+nuas);
System.out.println("Nilai Akhir = "+tugas.carina());
}
}