java中super关键字是什么？super关键字的用法。

class Account{
    private String name;
    private int id;
    public Account(){
    }
    public Account(String name,int id) {
        this.name=name;
        this.id=id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    
}

class CreditAccount extends Account{
    public CreditAccount() {
    }
    public CreditAccount(String name,int id) {
        super(name,id);                //super这里的意思是调用父类的构造方法，然后实行初始化属性
    }
}

public class supers extends Account{
    public static void main(String[] args) {
        CreditAccount user = new CreditAccount("lisi",1);
        System.out.println(user.getId()+","+user.getName());
    } 
}