Java中的equals是十分重要的,和= =要区别开来, = =和 equals 1、声明格式 public boolean equals(Object obj) 1. 其比较规则为:当参数obj引用的对象与当前对象为同一个对象时,就返回true,否则返回false. 比如以下两个对象animal1和animal2,引用不同的对象,因此用==或equals()方法比较的结果为false;而animal1...
1.3 == 和 equals Integer in = new Integer(20); Integer in2 = new Integer(20); System.out.println(in == in2); // false, ==:引用数据类型进行比较,比地址 System.out.println(in.equals(in2)); // true equals:Integer的,进行了重写,比较对象的内容 // 自动装箱 不是直接执行的 new Intege...
这是我在公司中看到已经离职高工写的一段代码,主要判断手机号是否注册,但这边判断写法有点疑问 // 判断手机号是否有注册 boolean isRegister = this.userRemoteService.isRegister(phone); if (!Boolean.TRUE.equals(isRegister)) { // 业务代码 } 为什么要这么写 !Boolean.TRUE.equals(isRegister) 而不是 !is...
hashCodein classObject Returns: the integer1231if this object representstrue; returns the integer1237if this object representsfalse. See Also: Object.equals(java.lang.Object),System.identityHashCode(java.lang.Object) hashCode public static int hashCode(boolean value) ...
public static int hashCode(boolean value) { // 即 true 返回 1231 而 false 返回 1237 return value ? 1231 : 1237; } equalspublic boolean equals(Object obj) { // 方法就是先判断是不是从 Boolean 实例化出来的,然后再继续比较是不是相等。 if (obj instanceof Boolean) { return value == ((...
public class BooleanExample { public static void main(String[] args) { boolean isJavaFun = true; boolean isFishTasty = false; System.out.println("Is Java fun? " + isJavaFun); System.out.println("Is fish tasty? " + isFishTasty); } } Powered By In this example, two boolean variab...
false所以个人理解入参写成Object类型只是写通用化模块的编码习惯的问题 public boolean equals(Object an...
.TRUE...SET_WITH_EXPIRE_TIME, expireTime); if (LOCK_SUCCESS.equals(result)) { return Boolean.TRUE...expireTime, this); Thread thread = new Thread(postponeTask); thread.setDaemon(Boolean.TRUE...String.valueOf(expireTime))); if (POSTPONE_SUCCESS.equals(result)) { return Boolean.TRUE...
1publicstaticlongsum(longa,longb) {2returna +b;3} java.lang.Double 1publicbooleanequals(Object obj) {2return(objinstanceofDouble)3&& (doubleToLongBits(((Double)obj).value) ==4doubleToLongBits(value));5}67publicstaticlongdoubleToLongBits(doublevalue) {...
Equals(Object) Indicates whether some other object is "equal to" this one. (Inherited fromObject) GetBoolean(String) Returnstrueif and only if the system property named by the argument exists and is equal to, ignoring case, the string"true". ...