【Java每日一题】20161104

package Nov2016;

public class Ques1104 {

    private String num;

    public void setNum(String num){
        num = num;  // 1
        this.num = num;  // 2
    }

    public String getNum(){
        return num;
    }
}

今日问题： 
注释1和2两处的作用是否一样？（点击以下“【Java每日一题】20161104”查看20161103问题解析） 


题目原发布于公众号、简书：【Java每日一题】20161104，【Java每日一题】20161104 
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