public final class Objects
Helper functions that can operate on any Object
.
Static Methods
equal(Object a, Object b)
public static boolean equal(Object a, Object b)
Determines whether two possibly-null objects are equal. Returns:
true
ifa
andb
are both null.true
ifa
andb
are both non-null and they are equal according to Object#equals(Object).false
in all other situations.
This assumes that any non-null objects passed to this function conform to the
equals()
contract.
Name | Description |
a | Object |
b | Object |
Type | Description |
boolean |
toStringHelper(Object self)
public static Objects.ToStringHelper toStringHelper(Object self)
Creates an instance of ToStringHelper.
This is helpful for implementing Object#toString(). Specification by example:
// Returns "ClassName{}" Objects.toStringHelper(this) .toString();
// Returns "ClassName{x=1}" Objects.toStringHelper(this) .add("x", 1) .toString();
// Returns "MyObject{x=1}" Objects.toStringHelper("MyObject") .add("x", 1) .toString();
// Returns "ClassName{x=1, y=foo}" Objects.toStringHelper(this) .add("x", 1) .add("y", "foo") .toString();
// Returns "ClassName{x=1}" Objects.toStringHelper(this) .omitNullValues() .add("x", 1) .add("y", null) .toString();
Name | Description |
self | Object the object to generate the string for (typically |
Type | Description |
Objects.ToStringHelper |