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packagecn.tty.map;public classStudent {    public static final int MALE=0;    public static final int FEMALE=1;    privateString stuNum;    privateString stuName;    private int gender;    publicStudent(){    }    publicStudent(String stuNum,String stuName,intgender){       this.stuNum=stuNum;       this.stuName=stuName;       this.gender=gender;    }       publicString getStuNum() {       return stuNum;    }    public voidsetStuNum(String stuNum) {       this.stuNum = stuNum;    }    publicString getStuName() {       return stuName;    }    public voidsetStuName(String stuName) {       this.stuName = stuName;    }    public intgetGender() {       return gender;    }    public voidsetGender(int gender) {       this.gender = gender;    }    publicString toString(){       return stuNum+"|"+stuName+"|"+gender;    }} packagecn.tty.map;importjava.util.HashMap;importjava.util.Iterator;importjava.util.Map;importjava.util.Set;public classMapInput {    public static voidmain(String[] args) {       //取得java.util.Map中的中的键和值       Map
   
     map=newHashMap
    
     ();       map.put("No.001", newStudent("001","tty",Student.MALE));       map.put("No.002", newStudent("002","hyl",Student.FEMALE));             System.out.println("输出方式一：");       Set
     
      
       > set=map.entrySet();       Iterator
       
        
         > iter=set.iterator(); while(iter.hasNext()){ Map.Entry
         
           entry=iter.next(); System.out.println("key-->"+entry.getKey()); System.out.println("value-->"+entry.getValue()); } System.out.println("输出方式二："); for(Map.Entry
          
            entry:map.entrySet()){ System.out.println("key-->"+entry.getKey()); System.out.println("value-->"+entry.getValue()); } System.out.println("输出方式三："); Set
           
             keySet=map.keySet(); Iterator
            
              iterator=keySet.iterator(); while(iterator.hasNext()){ String key=iterator.next(); Student val=map.get(key); System.out.println("key-->"+key); System.out.println("value-->"+val); } }}
            
           
          
         
        
       
      
     
    
   

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