importjava.util.Random;publicclassMain{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入位数n:");intn=scanner.nextInt();scanner.close();Randomrandom=newRandom();intrandomNumber=random.nextInt((int)Math.pow(10,n));StringrandomString=String.valueOf...
importjava.util.Random;publicclassRandomNumberGenerator{publicstaticvoidmain(String[]args){doublelowerBound=0.3;// 设置比例范围的下限doubleupperBound=0.7;// 设置比例范围的上限doublerandomValue=generateRandomNumber();// 生成随机数booleanisInRange=checkRange(randomValue,lowerBound,upperBound);// 检查是否在...
random.nextIn()的作用是随机生成一个int类型,因为int 的取值范围是-2147483648——2147483647,所以生成的数也是处于这个范围。 2.random.nextInt(int bound) random.nextInt(int bound)方法的作用是生成一个0-参数bound范围内的随机数,但是要记住,参数bound必须是正数,不可为负数,否则在运行时会报java.lang.Illega...
Methods declared in class java.lang.Object clone,equals,finalize,getClass,hashCode,notify,notifyAll,toString,wait,wait,wait Constructor Detail Random public Random() Creates a new random number generator. This constructor sets the seed of the random number generator to a value very likely to be di...
/*** Returns the current value of the running Java Virtual Machine's* high-resolution time source, in nanoseconds.** This method can only be used to measure elapsed time and is* not related to any other notion of system or wall-clock time.* The value returned represents nanoseconds since...
packagedemo03;importjava.util.ArrayList;importjava.util.Scanner;/*键盘录入学生信息,保存到集合中。循环录入的方式,1:表示继续录入,0:表示结束录入。定义学生类,属性为姓名,年龄,使用学生对象保存录入数据。使用ArrayList集合,保存学生对象,录入结束后,遍历集合。*/publicclassTest02{publicstaticvoidmain(String[]args...
nextInt() methodis available injava.util package.nextInt()方法在java.util包中可用。 nextInt() methodis used to return the next pseudo-random value from this Random Value Generator.nextInt()方法用于从此随机值生成器返回下一个伪随机值。
很简单的两句代码,需要注意两点: 第一:nextInt的取值是[0,n) ,不包括n。如果是随机list,直接传list的size,不用担心下标越界。 api说明: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 Returns a pseudorandom,uniformly distributed int value between0(inclusive)and the specifiedvalue(exclusive) ...
public int nextInt(int maxValue) 产生[0,maxValue)范围的随机整数,包含0,不包含maxValue; public double nextDouble() 产生[0,1)范围的随机小数,包含0.0,不包含1.0。 l Random使用方式: n import导包:所属包java.util.Random n 创建实例格式:Random 变量名 = new Random(); ...
Namespace: Java.Util Assembly: Mono.Android.dll An instance of this class is used to generate a stream of pseudorandom numbers; its period is only 248.C# 复制 [Android.Runtime.Register("java/util/Random", DoNotGenerateAcw=true)] public class Random : Java.Lang.Object, IDisposable, Ja...