public final class Integer extends Number
| Modifier and Type | Field and Description |
|---|---|
static int |
MAX_VALUE
MAX_VALUE
|
static int |
MIN_VALUE
MIN_VALUE
|
static Class |
TYPE
TYPE
|
| Constructor and Description |
|---|
Integer(int i)
Integer
|
Integer(String s) |
| Modifier and Type | Method and Description |
|---|---|
byte |
byteValue() |
static Integer |
decode(String s) |
double |
doubleValue() |
boolean |
equals(Object obj)
Compares two Objects for equality.
|
float |
floatValue() |
static Integer |
getInteger(String s) |
static Integer |
getInteger(String s,
int i) |
static Integer |
getInteger(String s,
Integer integer) |
int |
hashCode()
Returns a hash code value for the object.
|
int |
intValue() |
long |
longValue() |
static int |
parseInt(String s) |
static int |
parseInt(String s,
int i) |
short |
shortValue() |
static String |
toBinaryString(int i) |
static String |
toHexString(int i) |
static String |
toOctalString(int i) |
String |
toString()
Returns a string representation of the object.
|
static String |
toString(int i) |
static String |
toString(int i,
int j) |
static Integer |
valueOf(int i)
Returns an
Integer instance representing the specified
int value. |
static Integer |
valueOf(String s) |
static Integer |
valueOf(String s,
int i) |
public static final int MIN_VALUE
public static final int MAX_VALUE
public static final Class TYPE
public Integer(int i)
i - ?public Integer(String s) throws NumberFormatException
s - ?NumberFormatException - ?public static Integer decode(String s) throws NumberFormatException
s - ?NumberFormatException - ?public double doubleValue()
doubleValue in class Numberpublic boolean equals(Object obj)
Object
The equals method implements an equivalence relation:
x,
x.equals(x) should return true.
x and
y, x.equals(y) should return
true if and only if y.equals(x) returns
true.
x,
y, and z, if x.equals(y)
returns true and y.equals(z) returns
true, then x.equals(z) should return
true.
x
and y, multiple invocations of x.equals(y)
consistently return true or consistently return
false.
x, x.equals(null)
should return false.
The equals method for class Object implements the most
discriminating possible equivalence relation on objects; that is,
for any reference values x and y, this
method returns true if and only if x and
y refer to the same object (x==y has the
value true).
equals in class Objectobj - the reference object with which to compare.true if this object is the same as the obj
argument; false otherwise.Boolean.hashCode(),
Hashtablepublic float floatValue()
floatValue in class Numberpublic static Integer getInteger(String s, Integer integer)
s - ?integer - ?public int hashCode()
Objectjava.util.Hashtable.
The general contract of hashCode is:
hashCode method
must consistently return the same integer. This integer need not
remain consistent from one execution of an application to another
execution of the same application.
equals
method, then calling the hashCode method on each of the
two objects must produce the same integer result.
hashCode in class ObjectObject.equals(java.lang.Object),
Hashtablepublic static int parseInt(String s) throws NumberFormatException
s - ?NumberFormatException - ?public static int parseInt(String s, int i) throws NumberFormatException
s - ?i - ?NumberFormatException - ?public short shortValue()
shortValue in class Numberpublic static String toBinaryString(int i)
i - ?public static String toHexString(int i)
i - ?public static String toOctalString(int i)
i - ?public String toString()
ObjecttoString method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@', and
the unsigned hexadecimal representation of the hash code of the
object.
public static String toString(int i)
i - ?public static String toString(int i, int j)
i - ?j - ?public static Integer valueOf(String s) throws NumberFormatException
s - ?NumberFormatException - ?public static Integer valueOf(String s, int i) throws NumberFormatException
s - ?i - ?NumberFormatException - ?public static Integer valueOf(int i)
Integer instance representing the specified
int value.i - an int value.Integer instance representing i.