java.lang · java.base · since Java 1.0

Boolean

declaration

public final class Boolean implements Comparable<Boolean>, Constable, Serializable

Box for boolean with exactly two cached instances (TRUE/FALSE) and string parsing that treats anything but "true" (case-insensitive) as false.

Key methods

`static boolean parseBoolean(String s)`	"true" (any case) → true; everything else → false — no exceptions.
`static Boolean valueOf(boolean b)`	Returns the shared TRUE/FALSE instances.
`static boolean logicalAnd/Or/Xor(boolean, boolean)`	Method-reference-friendly combinators.