Java Basic wrapper class

The wrapper class is used in the collection to define the type of the collection element.

1. Minimum value of Integer.MIN_VALUE:int type: -2^31

2. Maximum value of Integer.MAX_VALUE:int type: 2^31-1

3, int integer.parseint (String sinteger);

Effect: Converts an integer of type string to data of type int.

4, String integer.tobinarystring (int value);

Function: Converts the decimal number to binary and returns the result string type.

1, the minimum value of the Long.MIN_VALUE:long type

2, the maximum value of the Long.MAX_VALUE:long type

3, Long Long.parselong (String slong);

Function: Converts an integer of type string to data of type long.

Java Basic wrapper class