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POI need help with a program ia m writing in JAVA ( nullpointer exception)
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  1. POI need help with a program ia m writing in JAVA ( nullpointer exception)
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    copied!<p>i ma trying to write a program where about the payments of employees and other staaff, I have an abstract superclass called Employee, and then the following FullTimeEmployee,PartTimeEmployee ,Orders and Salesman , are sub classes of Employee. I have only one problem with null pointers in Salesman, where i try to calculate the bonus they will get for each sale.</p> <p>here is my code in Salesman class </p> <pre><code> public Salesman(String firstname, String lastname,int code, String address, String city,int tk,int phone,String email,int deptcode,int card,double hours,String cat,int orderno,double salary,Orders[] ord/*,double sales*/){ super( firstname, lastname, code, address, city, tk, phone, email, deptcode, card, hours, cat ); this.orderno=orderno; setBaseSalary( salary ); //setGrossSales( sales ); Orders[] order= ord.clone();//new Orders[orderno];//create the array for the orders made by this salesman //order=ord; setSallary(order ); } public void setSallary( Orders[] order ){ //double sum=0; for(int i=0;i&lt;=order.length;) { grossSales+=order[i++].getamount(); //get the value of the sales done System.out.println(grossSales); } if (grossSales&lt;10000 ){ baseSalary+=baseSalary*0.05; } else if((grossSales&gt;=10000)||(grossSales&lt;=20000)){ baseSalary+=baseSalary*0.07; } else baseSalary+=baseSalary*0.1; } </code></pre> <p>in main i have </p> <pre><code>Orders[] array=new Orders[20]; array[0]=new Orders(1,"14/5/2010","agora aftolinitwn",2000.0); array[1]=new Orders(2,"14/5/2010","agora aftolinitwn",20000.0); Salesman sales1 =new Salesman("giannis", "antoniou",35, "vavilonos 7", "leffkosia",11475,69486931,"gäntoniou@hotmail.com",100,40,160.0,"salesman",2,1300.0,array); Salesman sales2 =new Salesman("andreas", "antoniou",35, "vavilonos 7", "lefkosia",11475,69486931,"äntonioua@hotmail.com",100,41,160.0,"salesman",1,1200.0,array); </code></pre> <p>basically what i do is creating an array with the salsmans info( amount earned from sale etc) and then sending it in to Saleman Constructor. i then copy the conents of tha array to another array an try to calulate the bonus. but i get </p> <blockquote> <p>Exception in thread "main" java.lang.NullPointerException</p> </blockquote> <pre><code> at misthodosia.Salesman.setSallary(Salesman.java:36) at misthodosia.Salesman.&lt;init&gt;(Salesman.java:28) at misthodosia.Misthodosia.main(Misthodosia.java:30) </code></pre> <p>Java Result: 1</p> <p>heres the Orders class as well</p> <pre><code>public class Orders { private int orderNo; private String orderDate; private String description; private double orderAmount; private Salesman man; public Orders(int no,String date,String descrip,double amount/*,Salesman man*/){ orderNo=no; orderDate=date; description=descrip; orderAmount=amount; //this.man=man; //Orders[] orders=new Orders[orderNo];//create the array for the orders made by this salesman } public double getamount(){ return orderAmount; } </code></pre> <p>}</p> <p>Can you help me ?? I know i am doing something wrong with the object array but i cant figure it out :S </p>
 

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