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  • list转换为map

    Java代码如下:

    package Test01;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    public class Test06 {
    
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		a();
    		b();
    	}
    	
    	@SuppressWarnings({ "rawtypes", "unchecked" })
    	public static void a(){
    		List list = new ArrayList();
    		for (int i = 0; i < 10; i++) {
    		list.add(i);
    		System.out.print(list.get(i)+" ");
    		}
    		System.out.println();
    		
    		Map map = new HashMap();
    		for (int i = 0; i < list.size(); i++) {
    		map.put(i, list.get(i));
    		System.out.print(map.get(i));
    		}
    		System.out.println();
    		System.out.println(map);
    	}
    	
    	@SuppressWarnings({ "rawtypes", "unchecked" })
    	public static void b(){
    		List list = new ArrayList();
    		
    		list.add("河南");
    		list.add("郑州");
    		list.add("登封");
    		list.add("开封");
    		list.add("上海");
    		
    		System.out.print(list);
    		
    		System.out.println();
    		
    		Map map = new HashMap();
    		for (int i = 0; i < list.size(); i++) {
    		map.put(i, list.get(i));
    		System.out.print(map.get(i));
    		}
    		System.out.println();
    		System.out.println(map);
    	}
    }
    

    代码运行后效果如下:

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  • 原文地址:https://www.cnblogs.com/henuyuxiang/p/3868415.html
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