首页 > 代码库 > ArrayList、HashMap 与 员工类（程序员、经理的结合使用） 相当于集合与继承的总结
ArrayList、HashMap 与 员工类（程序员、经理的结合使用） 相当于集合与继承的总结
1 package Day28ketangzuoye; 2 3 import java.util.ArrayList; 4 import java.util.HashMap; 5 import java.util.Map; 6 7 public class EmployeeTest { 8 9 public static void main(String[] args) { 10 Emp se1=new SE(0001,"蔡正",true,6000,80); 11 Emp se2=new SE(0002,"丁陆",true,7000,89); 12 13 Emp pm1=new PM(1001,"王拥江",true,9000,"一年",3000); 14 Emp pm2=new PM(1002,"贝杰明",true,13000,"七年",5000); 15 16 System.out.println("ArrayList"); 17 ArrayList<Emp> list=new ArrayList<Emp>(); 18 list.add(se1); 19 list.add(se2); 20 list.add(pm1); 21 list.add(pm2); 22 SE e; 23 PM m; 24 for(Emp p:list){ 25 if(p instanceof SE){ 26 e=(SE)p; 27 e.show(); 28 }else if(p instanceof PM){ 29 m=(PM)p; 30 m.show(); 31 }else{ 32 System.out.println("出错！"); 33 } 34 } 35 36 System.out.println("\n\n HashMap"); 37 Map<String,Emp> map=new HashMap<String,Emp>(); 38 map.put("蔡正",se1); 39 map.put("丁陆",se2); 40 map.put("王拥江",pm1); 41 map.put("贝杰明",pm2); 42 String[] str={"蔡正","丁陆","王拥江","贝杰明"}; 43 Emp p; 44 for(int i=0;i<map.size();i++){ 45 p=map.get(str[i]); 46 if(p instanceof SE){ 47 e=(SE)p; 48 e.show(); 49 }else if(p instanceof PM){ 50 m=(PM)p; 51 m.show(); 52 }else{ 53 System.out.println("出错！"); 54 } 55 } 56 57 } 58 } 59 60 class Emp { 61 public int id; 62 public String name; 63 public boolean gender; 64 public double salary; 65 66 67 public Emp() { 68 super(); 69 } 70 71 public Emp(int id, String name, boolean gender, double salary) { 72 super(); 73 this.id = id; 74 this.name = name; 75 this.gender = gender; 76 this.salary = salary; 77 } 78 79 public void show(){}; 80 } 81 82 class SE extends Emp { 83 int hot; 84 85 public SE(int id, String name, boolean gender, double salary,int hot) { 86 super(id,name,gender,salary); 87 this.hot = hot; 88 } 89 90 @Override 91 public void show() { 92 System.out.println("SE [id=" + id + ", name=" + name + ", gender=" 93 + gender + ", salary=" + salary + ", hot=" + hot + "]"); 94 } 95 } 96 97 class PM extends Emp{ 98 String exp; 99 double bonus;100 101 102 public PM(int id, String name, boolean gender, double salary,String exp, double bonus) {103 super(id,name,gender,salary);104 this.exp = exp;105 this.bonus = bonus;106 }107 108 109 @Override110 public void show() {111 System.out.println("PM [id=" + id + ", name=" + name + ", gender="112 + gender + ", salary=" + salary + ", exp=" + exp + ", bonus=" + bonus + "]");113 }114 }
1 ArrayList 2 SE [id=1, name=蔡正, gender=true, salary=6000.0, hot=80] 3 SE [id=2, name=丁陆, gender=true, salary=7000.0, hot=89] 4 PM [id=1001, name=王拥江, gender=true, salary=9000.0, exp=一年, bonus=3000.0] 5 PM [id=1002, name=贝杰明, gender=true, salary=13000.0, exp=七年, bonus=5000.0] 6 7 8 HashMap 9 SE [id=1, name=蔡正, gender=true, salary=6000.0, hot=80]10 SE [id=2, name=丁陆, gender=true, salary=7000.0, hot=89]11 PM [id=1001, name=王拥江, gender=true, salary=9000.0, exp=一年, bonus=3000.0]12 PM [id=1002, name=贝杰明, gender=true, salary=13000.0, exp=七年, bonus=5000.0]
ArrayList、HashMap 与 员工类（程序员、经理的结合使用） 相当于集合与继承的总结
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