java.lang · java.base · since Java 1.0

Long

declaration

public final class Long extends Number
        implements Comparable<Long>, Constable

Immutable box for long with parsing and comparison utilities. Same caching (−128…127) and same boxing pitfalls as Integer, at 64 bits.

Key methods

`static long parseLong(String s)`	String → long.
`static Long valueOf(long l)`	Boxing entry, small-value cache.
`static int compare(long a, long b)`	Safe comparison.
`static long parseUnsignedLong / divideUnsigned`	Unsigned interpretations of the same 64 bits.