Java Map定义的方法

短命女 2022-04-16 01:12 203阅读 0赞

package com.abin.map.test;
    
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    
    public class MapTestOne {
       
    	public static Map<String,String> addMap(){
       
    		Map<String,String> map=new HashMap<String,String>();
    		for(int i=0;i<10;i++){
       
    			String name="name"+i;
    			if(!map.containsKey(name)){
       
    				String value="john"+i;
    				map.put(name, value);
    			}
    			String sex="sex"+i;
    			if(!map.containsKey(sex)){
       
    				String value="female"+i;
    				map.put(sex, value);
    			}
    		}
    		return map;
    	}
    	public static void main(String[] args) {
       
    		Map<String,String> map=new HashMap<String,String>();
    		map=new MapTestOne().addMap();
    		Iterator it=map.keySet().iterator();
    		Object key=null;
    		Object value=null;
    		while(it.hasNext()){
       
    			key=it.next();
    			value=map.get(key);
    			System.out.println(key+":"+value);
    		}
    	}
    
    }

package com.abin.map.test;
    
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    
    public class MapTestOne {
       
    	public static Map<String,String> addMap(){
       
    		Map<String,String> map=new HashMap<String,String>();
    		for(int i=0;i<10;i++){
       
    			String name="name"+i;
    			if(!map.containsKey(name)){
       
    				String value="john"+i;
    				map.put(name, value);
    			}
    			String sex="sex"+i;
    			if(!map.containsKey(sex)){
       
    				String value="female"+i;
    				map.put(sex, value);
    			}
    		}
    		return map;
    	}
    	public static void main(String[] args) {
       
    		Map<String,String> map=new HashMap<String,String>();
    		map=new MapTestOne().addMap();
    		Set<String> keys = map.keySet();
    		Iterator<String> it = keys.iterator();
    		while(it.hasNext()) {
       
    			String key = it.next();
    			System.out.println(key + "-->" + map.get(key));
    		}
    
    	}
    
    }