}publicclassEqualsMethod1 {publicstaticvoidmain(String[] args) { DemoTest d1=newDemoTest(); DemoTest d2=newDemoTest(); DemoTest d3=d1; System.out.println("d1和d2相等吗:"+d1.equals(d2)); System.out.println("d1和d3相等吗:"+d1.equals(d3)); DemoTest d4=newDemoTest(11); D...
publicclassStudent{privateStringname;privateintage;// constructor, getters and setters// equals() method to compare two Student objects@Overridepublicbooleanequals(Objectobj){if(this==obj){returntrue;}if(obj==null||getClass()!=obj.getClass()){returnfalse;}Studentstudent=(Student)obj;if(age!=s...
String name; String age; //set method //get method; public boolean equals(Object obj){ if(this == obj){ return true; } if(obj!=null && obj.getClass() == obj.getClass){ Person person = (Person)obj; if(.equals() && this.age.equals(person.age)){ return true; } } return fals...
(1) 如果是基本类型比较,那么只能用==来比较,不能用equals 比如: publicclassTestEquals {publicstaticvoidmain(String[] args) {inta = 3;intb = 4;intc = 3; System.out.println(a== b);//结果是falseSystem.out.println(a == c);//结果是trueSystem.out.println(a.equals(c));//错误,编译不...
public boolean equals(Object obj) { return (obj instanceof Float) && (floatToIntBits(((Float)obj).value) == floatToIntBits(value)); } 原因嘛,里面提到了两点: However, there are two exceptions:If f1 and f2 both representFloat.NaN, then the equals ...
@Overridepublicbooleanequals(Object o){thrownewAssertionError();// Method is never called} 所以什么时候重写Object.equals方法比较合适呢?即,当一个类有一个逻辑相等的概念,并且这个概念不同于对象的特性,并且父类也没有已经重写了的equals方法来实现需求的情况。依赖于值的类就是一个明显的例子,比如Integer,Da...
equals(myStr3)); // false Try it Yourself » Definition and UsageThe equals() method compares two strings, and returns true if the strings are equal, and false if not.Tip: Use the compareTo() method to compare two strings lexicographically....
A Method provides information about, and access to, a single method on a class or interface.C# 复制 [Android.Runtime.Register("java/lang/reflect/Method", DoNotGenerateAcw=true)] public sealed class Method : Java.Lang.Reflect.Executable, IDisposable, Java.Interop.IJavaPeerable...
publicclassClassTest{voidm(){// 方法体 }}ClassTestct=newClassTest();ct.m();//对象.方法名(); 现有对象， 后调用方法。以上是正常的调用方法。但是对于反射正好相反。//Method对象.invoke(对象, 参数); 没有参数可以不填写。// 获得 Method 对象Methodm=clazz.getDeclaredMethod("t1", int[].class)...
2. The .equals()Method By default, theObjectclass defines both the .equals()and .hashCode()methods. As a result, every Java class implicitly has these two methods.: classMoney{intamount; String currencyCode; } Moneyincome=newMoney(55,"USD");Moneyexpenses=newMoney(55,"USD");booleanbalanced...