ap.java.lang
Class Integer

java.lang.Object
  |
  +--ap.java.lang.Integer

All Implemented Interfaces:

Comparable

public class Integer

extends java.lang.Object

implements Comparable

The class Integer is an immutable wrapper class for the primitive type int, allowing primitive values in some contexts to be treated as objects.

The four methods below are those specified in the APCS Java subset for the wrapper class Integer. An object whose type is Integer encapsulates a single int value. The methods in the APCS Java subset are applicable to Integer objects. Two static methods not in the subset are often useful in practice. These methods, parseInt and toString are shown in use in the following code.

     String s = Integer.toString(1024);  // s is "1024"
     int i = Integer.parseInt("12345")   // i is 12345
 

Constructor Summary

Integer(int value)
Constructs an immutable Integer wrapping value.

Method Summary

int	compareTo(Object other) Compares two Integer objects and returns a value consistent with the contract of Comparable.compareTo and with the value returned by Integer.equals.
boolean	equals(Object other) Determines if this Integer object is equal to another.
int	intValue() Returns the value represented by this object.
String	toString() Returns a representation of this object as a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Integer

public Integer(int value)

Constructs an immutable Integer wrapping value.

Parameters:

value - is the value wrapped by this object

Method Detail

intValue

public int intValue()

Returns the value represented by this object.

Returns:

the primitive int value represented by this object

equals

public boolean equals(Object other)

Determines if this Integer object is equal to another. This method returns true if and only if this.intValue() == int.doubleValue().

Parameters:

other - is the other Integer object to which this one is compared

Returns:

true if this object is equal to other.

toString

public String toString()

Returns a representation of this object as a string.

Overrides:

toString in class java.lang.Object

Returns:

a string form of this Integer object.

compareTo

public int compareTo(Object other)

Compares two Integer objects and returns a value consistent with the contract of Comparable.compareTo and with the value returned by Integer.equals.

Specified by:

compareTo in interface Comparable

Parameters:

other - is the Integer object to which this one is compared

Returns:

the value 0 if this object is equal to other, a value less than 0 if this object is less than other, and a value greater than 0 if this object is greater than other