Learn the Super keyword for Java tutorials

Learn to program the Java Tutorial Super keyword tutorial released, welcome to visit through Xuebiancheng8.com.

The previous lesson analyzed the use of this keyword, this keyword has two functions, the first function is to access the current object construction method, the second role is to access the current object construction method, in fact, super and this keyword function similar, super's role has access to the parent class construction method, The second function accesses the properties and methods of the parent class.

Let's analyze the role of super keywords. First look at an example

public class person{

Private String username;

private String password;

.... Setter Getter omitted

Public person () {

SYSTEM.OUT.PRINTLN ("Access construction Method");

}

}

public class Student extends person{

Public Student () {

Super (); To access the constructor of the parent class, only on the first row

Super.setusername ("Hello"); Access the Setusername method of the parent class, calling the method of the parent class

}

}

In the example above, use the

Super (); To access the constructor of the parent class, only on the first row

Super.setusername ("Hello"); Access the Setusername method of the parent class, calling the method of the parent class

Above is the use of super.

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Learn the Super keyword for Java tutorials