代码规范：那种写法更好？

Question

[code="java"]
package org.exmaple;

import java.util.HashMap;
import java.util.Map;

public class ExampleOne {

public static void main(String[] args) {

    Map<String, Object> clause = null;

    // 1.
    clause = new HashMap<String, Object>();
    clause.put("key1", "value1");

    clause = new HashMap<String, Object>();
    clause.put("key2", "value2");

    clause = new HashMap<String, Object>();
    clause.put("key3", "value3");

    // 2.
    clause = new HashMap<String, Object>();
    clause.put("key1", "value1");

    clause.clear();
    clause.put("key2", "value2");

    clause.clear();
    clause.put("key3", "value3");
}

}

[/code]

上面是两种不同的写法，那种写法更好？

Answer 1

clause = new HashMap();

clause.put("key1", "value1");

    clause.clear();   
    clause.put("key2", "value2");   

    clause.clear();   
    clause.put("key3", "value3");  

这种写法，理解比较好。第一种写法的是对象覆盖了，GC回收了那些没用的对象，这个看个人的癖好了