Java简单类（部门、领导、雇员关系）
1 class Dept { 2 private int deptno ; 3 private String dname ; 4 private String loc ; 5 private Emp emps [] ; //多个雇员 6 public void setEmps(Emp [] emps) { 7 this.emps = emps ; 8 } 9 public Emp[] getEmps() { 10 return this.emps ; 11 } 12 public Dept(int deptno,String dname,String loc){ 13 this.deptno = deptno ; 14 this.dname = dname ; 15 this.loc = loc ; 16 } 17 public String getInfo() { 18 return "部门编号：" + this.deptno + "，名称：" + this.dname + "，位置：" + this.loc ; 19 } 20 } 21 class Emp { 22 private int empno ; 23 private String ename ; 24 private String job ; 25 private double sal ; 26 private double comm ; 27 private Dept dept ;//表示对应的部门信息 28 private Emp mgr ; //表示雇员对应的领导 29 public void setMgr(Emp mgr) { 30 this.mgr = mgr ; 31 } 32 public Emp getMgr() { 33 return this.mgr ; 34 } 35 public void setDept(Dept dept){ 36 this.dept = dept ; 37 } 38 public Dept getDept() { 39 return this.dept ; 40 } 41 public Emp(int empno,String ename,String job,double sal,double comm){ 42 this.empno = empno ; 43 this.ename = ename ; 44 this.job = job ; 45 this.sal = sal ; 46 this.comm = comm ; 47 } 48 public String getInfo(){ 49 return "雇员编号：" + this.empno + "，姓名：" + this.ename + "，职位：" + this.job + "，工资：" + this.sal + "，佣金：" + this.comm ; 50 } 51 } 52 public class Test2 { 53 public static void main(String args[]) { 54 Dept dept = new Dept(10,"ACCOUNTING","CHINA") ; //部门信息 55 Emp ea = new Emp(7369,"CHEN","CLERK",800.0,0.0);//雇员信息 56 Emp eb = new Emp(7902,"PENG","MANAGER",2500.0,0.0);//雇员信息 57 Emp ec = new Emp(7719,"KING","PRESIDENT",5000.0,0.0);//雇员信息 58 ea.setMgr(eb) ; //雇员与领导 59 eb.setMgr(ec) ; //雇员与领导 60 ea.setDept(dept) ; //雇员与部门 61 eb.setDept(dept) ; //雇员与部门 62 ec.setDept(dept) ; //雇员与部门 63 dept.setEmps(new Emp[]{ea,eb,ec}) ; 64 System.out.println(ea.getInfo()) ;//通过雇员找到领导信息和部门信息 65 System.out.println("\t|-"+ ea.getMgr().getInfo()) ; 66 System.out.println("\t|-"+ ea.getDept().getInfo()) ; 67 System.out.println("----------------------------------------") ; 68 System.out.println(dept.getInfo()) ;//根据部门找到所有的雇员以及每个雇员的领导信息 69 for (int x = 0 ;x < dept.getEmps().length ;x ++ ){ 70 System.out.println("\t|-"+ dept.getEmps()[x].getInfo()) ; 71 if (dept.getEmps()[x].getMgr() != null){ 72 System.out.println("\t|-"+dept.getEmps()[x].getMgr().getInfo()) ; 73 } 74 } 75 } 76 }
一个部门中有多个雇员，每个雇员有一个领导或者没有领导
