import java.util.*; /** * 权重随机算法实现 * a b c d 对应权重范围 --- [0,1).[1,3).[3,6).[6,10) */ public class RandomSF { private static TreeMap<String, Integer> hm = new TreeMap<>(); public static void main(String[] args) throws Exception { TreeMap<Stri…
14.4 Explain the difference between templates in C++ and generics in Java. 在Java中,泛式编程Generic Programming的实现是通过一种就做类型擦除Type Erasure的机制来实现的.当源码转为Java虚拟机JVM的字节代码时擦除参数的类型,例如下面的例子: Vector<String> vector = new Vector<String>(); vector.add(new Strin…
package com.java.sizeyunsuan; public class lianxi { String f() { int i=(int)(Math.random()*10); int j=(int)(Math.random()*10); if(i>=j) { int temp=i; i=j; j=temp; } return("("+i+"/"+j+")"); } public static void main(String…