Java.lang package tutorial on Java.lang Boolean Class
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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

sr.no. 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

sr.no. 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