Constructor call must be the first statement in a constructor

kento_joyasa

于 2022-10-21 10:33:54 发布

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分类专栏： java基础文章标签： java 开发语言

本文链接：https://blog.youkuaiyun.com/beloved_yu/article/details/127441214

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public class Student extends Persons{

	private String id;
	public Student() {
		// TODO Auto-generated constructor stub
	}
	
	public Student(String name, String id, Integer age) {
		this.id = id;
		
		super(name, age);
	}
	
	public void show() {
		
	}

}

这种情况下就属于，没有先调用父类的构造器然后就会报错，应该先调用父类构造器super然后this

修改：

public class Student extends Persons{

	private String id;
	public Student() {
		// TODO Auto-generated constructor stub
	}
	
	public Student(String name, String id, Integer age) {
		super(name, age);
		this.id = id;
		
	}
	
	public void show() {
		
	}

}