Java对象数组

 1 package first;
 2 
 3 public class Employee {
 4     private String fName, lName;
 5     private long _ID;
 6     private int workdays;
 7     private float BASIC, HRA, TA, PF, NET;    
 8 
 9     public String getfName() {
10         return fName;
11     }
12     public void setfName(String fName) {
13         this.fName = fName;
14     }
15     public String getlName() {
16         return lName;
17     }
18     public void setlName(String lName) {
19         this.lName = lName;
20     }
21     public long get_ID() {
22         return _ID;
23     }
24     public void set_ID(long _ID) {
25         this._ID = _ID;
26     }
27     public float getBASIC() {
28         return BASIC;
29     }
30     public void setBASIC(float bASIC) {
31         BASIC = bASIC;
32     }
33     public int getWorkdays() {
34         return workdays;
35     }
36     public void setWorkdays(int workdays) {
37         this.workdays = workdays;
38     }
39     public float calculateSalary(){
40             BASIC = BASIC* workdays;
41             HRA = 0.04f * BASIC;
42             TA = 0.01f * (BASIC + HRA);
43             PF = 0.0125f * (BASIC + HRA + TA);
44             NET = (BASIC + HRA + TA) - PF;
45             return NET;
46             
47     }
48 
49 
50 }

 1 package first;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Company {
 6 
 7     public static void main(String[] args) {
 8         Employee []emp=new Employee[5];
 9         Scanner reader = new Scanner(System.in);
10         for(int i=0;i<5;i++){
11             System.out.println("Enter the  0"+(i+1)+" Employee");
12             emp[i]=new Employee(); //否则会提示空指针异常  Otherwise you will be prompted to null pointer exception
13             System.out.println("Enter First Name:");        
14             emp[i].setfName(reader.next());
15             System.out.println("Enter Last Name:");
16             emp[i].setlName(reader.next());
17             System.out.println("Enter Daily Wages:");
18             emp[i].setBASIC(reader.nextFloat());
19             System.out.println("Enter Number of Working Days:");
20         
21             emp[i].setWorkdays(reader.nextInt());
22             emp[i].set_ID(100+(long)( Math.random()*(200-100)));//create ID between 100--200
23             
24         }
25         System.out.println("ID    FirstName   LastName   WorkingDays    Salary  ");
26         for(int j=0;j<5;j++){
27             System.out.printf("%d \t %s \t  %s\t\t%d \t %.2f\n",emp[j].get_ID(),emp[j].getfName(),emp[j].getlName(),emp[j].getWorkdays(),emp[j].calculateSalary());
28         }
29 
30     }
31 
32 }