* that is, for any non-null reference values {@code x} and * {@code y}, this method returns {@code true} if and only * if {@code x} and {@code y} refer to the same object * ({@code x == y} has the value {@code true}). * * Note that it is generally necessary to...
* that equal objects must have equal hash codes. * *@paramobj the reference object with which to compare. *@return{@codetrue} if this object is the same as the obj * argument; {@codefalse} otherwise. *@see#hashCode() *@seejava.util.HashMap*/publicbooleanequals(Object obj) {return(t...
If two objects are equal according to theequals(Object)method, then calling thehashCodemethod on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to theequals(java.lang.Object)method, then calling thehashCodemethod on ea...
* the most discriminating possible equivalence relation on objects; * that is, for any non-null reference values x and * y, this method returns true if and only * if x and y refer to the same object * (x == y has the value true). * * Note that it is generally necessary to o...
ByteBuffer 1: [20, 30, 40, 0, 0] ByteBuffer 2: [20, 30, 40, 0, 0] both are equal Java Copy例子2 :// Java program to demonstrate // equals() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the ...
* @return {@code true} if and only if the specified {@code Object} is a * {@code BigDecimal} whose value and scale are equal to this * {@code BigDecimal}'s. * @see #compareTo(java.math.BigDecimal) * @see #hashCode */ @Override public boolean equals(Object x) { if (!(x ...
// Java program to demonstrate // use of == operator in Java class GFG { public static void main(String[] args) { // Get some Strings to compare String s1 = "A"; String s2 = "A"; String s3 = "A"; String s4 = new String("A"); // Compare s1 and s2 // It should ...
* if {@code x} and {@code y} refer to the same object * ({@code x == y} has the value {@code true}). * * Note that it is generally necessary to override the {@code hashCode} * method whenever this method is overridden, so as to maintain the * general...
ComparesthisBigDecimalwiththe specified Objectforequality.Unlike compareTo,thismethod considers two BigDecimal objects equal onlyifthey are equalinvalue andscale(thus2.0is not equal to2.00when compared bythismethod) 大概意思就是,equals方法和compareTo并不一样,equals方法会比较两部分内容,分别是值(value)和...
在JavaSE 7 Specification中指出, "Note that it is generally necessary to override the hashCode method whenever this method(equals) is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes." ...