抛出异常也是一种保证有效的方式,但显然,我们不愿意看到。 //在一个线程执行remove后,另一个线程再去执行get,这时候就会发生ArrayIndexOutOfBoundsException。//由于没有进行同步,线程获取到的Vector大小是失效的。publicstaticObject getLast(Vector list) {intlastIndex = list.size() - 1;returnlist.get(lastInd...
packagecom.atguigu.exam;importjava.util.Arrays;publicclassTest20 {publicstaticvoidmain(String[] args) {int[] array = {4,3,6,1}; sort(array); System.out.println(Arrays.toString(array)); }publicstaticvoidsort(int[] arr){//轮数:n-1for(inti = 1; i < arr.length; i++) {//每一轮...
如果是使用容器自带的 Iterator 操作,则会抛出 ConcurrentModificationException,原因是迭代过程中会执行 next 方法,该方法会判断 modCount 值是否有变动,有则抛出异常快速失败,而删除等操作会修改 modCount 值;如果是自行循环迭代(for-each 除外,它只是一个语法糖,本质上依旧是 Iterator 迭代),一般会抛出的异常是 Ar...
8. Recursive Element Count in Array Write a Java recursive method to count the number of occurrences of a specific element in an array. Click me to see the solution 9. Recursive Sum of Odd Numbers in Array Write a Java recursive method to find the sum of all odd numbers in an array. ...
Value in Row Max Value 2D Array Creator Checkers Sum a 2D Array ArrayLists LEVEL 1 ArrayList First Element ArrayList Last Element ArrayList Middle Element Initializing an ArrayList ArrayList Sum ArrayList Multiply Java: Sum of ArrayList Elements ...
Complete the countDuplicates function in the editor below. It has 1 parameter: an array of integers, numbers. It must return an integer denoting the number of non-unique values in the numbers array. Constraints 1≤ n ≤ 1000 1≤ numbersi ≤ 1000 ...
a 442. Find All Duplicates in an Array (LeetCode in Common Lisp) Solution (in-package :it.bese.fiveam) ; @param {Integer[]} nums ; @return {Integer[]} (defun find_duplicates(nums) (let ((len (length nums)) (hash (make-hash-table :test #'=))) (dotimes (i len) (let ((nu...
Value in Row Max Value 2D Array Creator Checkers Sum a 2D Array ArrayLists LEVEL 1 ArrayList First Element ArrayList Last Element ArrayList Middle Element Initializing an ArrayList ArrayList Sum ArrayList Multiply Java: Sum of ArrayList Elements ...
32. Write a Java program to arrange the elements of a given array of integers where all positive integers appear before all the negative integers. Click me to see the sample solution33. Write a Scala program to separate even and odd numbers of a given array of integers. Put all even ...
Error code 1734 The array bounds are invalid when trying to install windows service Error code: 0x5 when trying to delete a account sidhistory in ADSI Edit Error code: 0x5 when trying to delete a PSO in ADSI Edit Error determining whether the target server is already a domain controller: ...