Data structure and Algorithm (Java edition) summary One

1, in order to get two exactly the same array (1) loop traversal (2) The Arraycopy method of the System class.

2. When the array is passed as a parameter of the method, the array is passed the reference, and the operations of the arrays affect the original arrays.

3, this keyword (1) implicit parameter Reference (2) calling other constructor methods in the class

4. Super keyword (1) Call parent class method (2) Call parent class constructor method

5. The instanceof operator in Java is used to indicate at run time whether an object is an instance of a particular class. Instanceof Indicates whether this object is an instance of this particular class or its subclasses by returning a Boolean value. L Example:

Result = Object Instanceof class
Parameters:
Result: Boolean type.
Object: Required option. An arbitrary object expression.
Class: Required option. Any of the defined object classes.
Description
If object is an instance of class, the instanceof operator returns TRUE. Returns False if object is not an instance of the specified class, or if object is null.

Data structure and Algorithm (Java edition) summary One