int int属于Java中的整型,长度为4字节32bit,取值-2^31 (-2,147,483,648)到 2^31-1(2,147,483,647),变量初始化默认值为0,包装类Integer long long属于Java中的整型,长度为8字节64bit,取值-2^63 (-9,223,372,036,854,775,808)到 2^63-1(9,223,372,036,854,775,8087),变量初始化默认值为...
(1) int i = Integer.parseInt([String]); 或 i = Integer.parseInt([String],[int radix]); (2) int i = Integer.valueOf(my_str).intValue(); 注: 字串转成 Double, Float, Long 的方法大同小异. 2 、将整数 int 转换成字串 String (1) String s = String.valueOf(i); (2) String s ...
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privatefinal AtomicInteger ctl=newAtomicInteger(ctlOf(RUNNING,0));privatestaticfinal intCOUNT_BITS=Integer.SIZE-3;privatestaticfinal intCAPACITY=(1<<COUNT_BITS)-1;// runState is stored in the high-order bitsprivatestaticfinal intRUNNING=-1<<COUNT_BITS;privatestaticfinal intSHUTDOWN=0<<COUNT_BITS...
整数类型有:byte(8bits)、short(16bits)、int(32bits)、long(64bits)、 浮点类型有:单精度(32bits float)、双精度(64bits double) 布尔变量有:boolean 取值ture、false 字符类型有:char unicode字符,16位 基本类型对应的类类型:Integer、Float、Boolean、Character、Double、Short、Byte、Long ...
First of all, in Java, long values are represented by signed 64-bit numbers. On the other hand, int values are represented by signed 32-bit numbers. Therefore, converting a higher data type into a lower one is called narrowing type casting. As a result of these conversions, some bits wo...
String->int、float、long、double Exp String intstring=”10”; String floatstring=”10.1f”; String longstring=”99999999”; String doubleString=”99999999.9”; Int I=Integer.parseInt (intstring); Float f= Integer.parseInt (floatstring); ...
java---int,string 转化为long 2019-10-12 16:51 − String: 1.返回Long包装类型: String str = "aaa"; long l = Long.parseLong([str]); 2.返回long基本数据类型: String str = "aaa"; long l = Long.valueOf("str "... 凌霜寒雪 0 4691 struct和byte类型转换 2019-12-19 20:53 ...
public void testRandom_generatingLongUnbounded() throws Exception { long unboundedLong = new Random().nextLong(); System.out.println(unboundedLong); } <blockquote> 因为 Random 类使用的种子是 48bits,所以 nextLong 不能返回所有可能的 long 值,long 是 64bits。 </blockquote> 生成有边界的...
void repaint(long time, int x, int y, int width, int height) 在time 毫秒内重绘此组件的指定矩形区域。 void setContentPane(Container contentPane) 设置contentPane 属性。 void setDefaultCloseOperation(int operation) 设置用户在此窗体上发起 "close" 时默认执行的操作。 static void setDefaultLookAnd...