java的this用法，解决重名

package lei;

public class Yongfa_this2 {
    public static void main(String[] args) {
        Yongfa_this yong=new Yongfa_this();
        yong.sey("孙悟空");
        System.out.println(yong.name);
    }
}
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package lei;

public class Yongfa_this {
    String name;//成员变量叫name

    public  void sey(String name){//传入的参数也叫name
        this.name=name;//使用this
    }
}