publicclassLamdbaTest2{//语法格式一:无参,无返回值@Testpublicvoidtest1(){//未使用Lambda表达式Runnable r1=newRunnable(){@Overridepublicvoidrun(){System.out.println("Hello Lamdba");}};r1.run();System.out.println("===");//使用Lambda表达式Runnable r2=()->{System.out.println("Hi Lamdba");}...
Using the same values is not usually a good idea, because it delays the start of garbage collection until the heap is full. The first time that the Garbage Collector runs, therefore, becomes a very expensive operation. Also, the heap is more likely to be fragmented and require a heap comp...
* value to ensure reads of fresh values after checking other pool * state). * @return true if successful */privatebooleanaddWorker(Runnable firstTask,boolean core){//外层循环,负责判断线程池状态retry:for(;;){int c=ctl.get();int rs=runStateOf(c);//状态// Check if queue empty only if ...
(); final int selectorCount = Math.max(cpuCores / 2, 4); final int workerCount = Math.max(cpuCores * 2, 8); final LoopResources pool = LoopResources.create("HCofSWC", selectorCount, workerCount, true); final Function<? super TcpClient, ? extends TcpClient> tcpMapper = tcp -> tcp...
classes text += BigInteger.valueOf(10).pow(100) .add(BigInteger.valueOf(43)).toString(...
Math.max() It returns the Largest of two values. Math.min() It is used to return the Smallest of two values. Math.round() It is used to round of the decimal numbers to the nearest value. Math.sqrt() It is used to return the square root of a number. ...
}classHouse{@Length(min = 1,max = 10)privateString name; } 拓展 异常处理 参数校验异常:MethodArgumentNotValidException 方式一:基于异常监听@ControllerAdvice(参考:优雅的java参数校验) /** * 全局异常处理器 */@Slf4j@ControllerAdvicepublicclassGlobalExceptionHandler{/** ...
Unicode与Ascii区别:Unicode编码表包含ASCII的所有内容,同时还包括了全世界的语言,ASCII只有1字节,而Unicode编码是2字节,能够代表65536种文字,足以包含全世界的文字了!(我们编译出来的字节码文件也是使用Unicode编码的,所以利用这种特性,其实Java支持中文变量名称、方法名称甚至是类名) ...
*/privatefinallongmaxDatacenterId=-1L^ (-1L<< datacenterIdBits);/** * 序列在id中占的位数 */privatefinallongsequenceBits=12L;/** * 机器ID向左移12位 */privatefinallongworkerIdShift=sequenceBits;/** * 数据标识id向左移17位(12+5)
super(checkRange(atomicNumber, MIN_ATOMIC_NUMBER , MAX_ATOMIC_NUMBER), color); } private static intcheckRange(int value, int lowerBound, int upperBound){ if(value<lowerBound||value>upperBound) thrownewIllegalArgumentException("Atomic number out of range"); ...