cn.watsontech.core.utils

类 Objects

java.lang.Object

cn.watsontech.core.utils.Objects

public final class Objects
extends Object

Created by watson on 2020/4/18.

方法概要

限定符和类型	方法和说明
static boolean	equal(Object a, Object b) Determines whether two possibly-null objects are equal.
static int	hashCode(Object... objects) Generates a hash code for multiple values.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

equal

public static boolean equal(Object a,
                            Object b)

Determines whether two possibly-null objects are equal. Returns:

• true if a and b are both null.
• true if a and b 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.

Note for Java 7 and later: This method should be treated as deprecated; use Objects.equals(java.lang.Object, java.lang.Object) instead.

hashCode

public static int hashCode(Object... objects)

Generates a hash code for multiple values. The hash code is generated by calling Arrays.hashCode(Object[]). Note that array arguments to this method, with the exception of a single Object array, do not get any special handling; their hash codes are based on identity and not contents.

This is useful for implementing Object.hashCode(). For example, in an object that has three properties, x, y, and z, one could write:

 public int hashCode() {
   return Objects.hashCode(getX(), getY(), getZ());
 }
 

Warning: When a single object is supplied, the returned hash code does not equal the hash code of that object.

Note for Java 7 and later: This method should be treated as deprecated; use Objects.hash(java.lang.Object...) instead.