首先,我们创建了一个Random对象,然后生成一个随机数,接着将有符号整数转换为无符号整数,最后回到初始状态。 总结起来,我们可以使用Java的Random类和Integer类来生成随机的32位无符号整数。通过创建Random对象并使用nextInt方法生成有符号整数,然后使用Integer类的toUnsignedLong方法将有符号整数转换为无符号整数,我们就可以...
1. 使用 java.util.Random 类 Random 类是 Java 标准库中提供的随机数生成器,可以生成整数、浮点数等。 java import java.util.Random; public class RandomExample { public static void main(String[] args) { Random rand = new Random(); // 生成一个随机整数(范围:Integer.MIN_VALUE 到 Integer.MAX_...
int:-1849568817 Integer.MIN-Integer.MAX:-2147483648-2147483647 1. 2. 3. 4. 5. 6. 7. 在上述代码中,我们使用了Integer.MIN_VALUE和Integer.MAX_VALUE,这两个是Integer类设定的最小值和最大值。在Java的八种基础数据类型中,除了boolean为true和false之外,其他的七种类型都是有MIN_VALUE和MAX_VALUE这两个...
Parameters: origin- the least value that can be returned bound- the upper bound (exclusive) for the returned value Returns: a pseudorandomly chosenlongvalue between the origin (inclusive) and the bound (exclusive) Throws: IllegalArgumentException- iforiginis greater than or equal tobound ...
= 0; } public void nextBytes(byte[] bytes) { for (int i = 0, len = bytes.length; i < len; ) for (int rnd = nextInt(), n = Math.min(len - i, Integer.SIZE / Byte.SIZE); n-- > 0; rnd >>= Byte.SIZE) bytes[i++] = (byte) rnd; } Math.r...
3. Generate an Unbounded Integer Let’s move right on to generating a random Integer with no bounds: @Test public void givenUsingPlainJava_whenGeneratingRandomIntegerUnbounded_thenCorrect() { int generatedInteger = new Random().nextInt(); } As you can see, it’s pretty close to generating ...
代码语言:java 复制 importjava.util.Random;publicclassRandomExample{publicstaticvoidmain(String[]args){Randomrandom=newRandom();intrandomInt=random.nextInt(100);longrandomLong=random.nextLong();floatrandomFloat=random.nextFloat();doublerandomDouble=random.nextDouble();System.out.println("Random Integer:...
1. java.util.Random This Random().nextInt(int bound) generates a random integer from 0 (inclusive) to bound (exclusive). 1.1 Code snippet. For getRandomNumberInRange(5, 10), this will generates a random integer between 5 (inclusive) and 10 (inclusive). ...
4)public static String getProperty(String key):获得属性名key的属性对应的值,key可以取java.version,os.name,user.name,user.dir等等。 Integer类 1)和int的转换(java1.5及以上版本) intm = 12; Integer in= m;//int转integerintn = in;//integer转int ...
importjava.util.Random; importjava.util.Set; publicclassLotterySystem{ publicstaticvoidmain(String[]args){ intnumberOfWinners=5;// 假设需要生成 5 个中奖号码 Set<Integer>winningNumbers=newHashSet<>(numberOfWinners);// 使用Set存储不重复的中奖号码 ...