Java.lang Boolean Class
Introduction
The java.lang.Boolean class wraps a value of the primitive type boolean in an object. An object of type Boolean contains a single field whose type is boolean.
Class declaration
Following is the declaration for java.lang.Boolean class:
public final class Boolean
extends Object
implements Serializable, Comparable<Boolean>
Field
Following are the fields for java.lang.Boolean class:
- static Boolean FALSE — This is the Boolean object corresponding to the primitive value false.
- static Boolean TRUE — This is the Boolean object corresponding to the primitive value true.
- static Class<Boolean> TYPE — This is the Class object representing the primitive type boolean.
Class constructors
S.N. | Constructor & Description |
---|---|
1 | Boolean(boolean value)
This allocates a Boolean object representing the value argument. |
2 | Boolean(String s)
This allocates a Boolean object representing the value true if the string argument is not null and is equal, ignoring case, to the string “true”. |
Class methods
S.N. | Method & Description |
---|---|
1 | boolean booleanValue()
This method returns the value of this Boolean object as a boolean primitive. |
2 | int compareTo(Boolean b)
This method compares this Boolean instance with another. |
3 | boolean equals(Object obj)
This method returns true if and only if the argument is not null and is a Boolean object that represents the same boolean value as this object. |
4 | static boolean getBoolean(String name)
This method returns true if and only if the system property named by the argument exists and is equal to the string “true”. |
5 | int hashCode()
This method returns a hash code for this Boolean object. |
6 | static boolean parseBoolean(String s)
This method parses the string argument as a boolean. |
7 | String toString()
This method returns a String object representing this Boolean’s value. |
8 | static String toString(boolean b)
This method returns a String object representing the specified boolean. |
9 | static Boolean valueOf(boolean b)
This method returns a Boolean instance representing the specified boolean value. |
10 | static Boolean valueOf(String s)
This method returns a Boolean with a value represented by the specified string. |
Methods inherited
This class inherits methods from the following classes:
- java.lang.Object
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