Exception in thread "main" java.util.ConcurrentModificationException

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Exception in thread "main" java.util.ConcurrentModificationException解决方案

我想判断一个集合里面有没有"world"这个元素,如果有,我就添加一个"javaee"元素, 当时的做法是: public class ListIteratorDemo1 { public static void main(String[] args) { // 创建List集合对象 List list = new ArrayList(); // 添加元素 list.add("hello"); list.add("world"…

Exception in thread "main" java.util.ConcurrentModificationException

package test; import java.util.ArrayList; import java.util.Iterator; import java.util.List; public class Test { public static void main(String[] args) { List list = new ArrayList(); list.add("1"); list.add("2"); list.add("3")…

Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 0 [ ^

Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 0 [ ^ 出现此错误应该是字符转义出现问题: System.out.println(str.replaceAll("[", "22")); 解决方案:在[之前加上\\ System.out.println(str.replaceAll(&qu…

Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 0 解决方法: 要对切割字符进行转义\\

使用str.split("[",15)时,出现Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 0 [ ^的问题解决办法为在[加上\\转义 str.split("\\[",15) …

Exception in thread "main" java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Expiring 1 record(s) for topic_test_1219-2: 30010 ms has passed since batch creatio

代码如下 public static void producer1() throws ExecutionException, InterruptedException { Properties props = new Properties(); props.put("bootstrap.servers", "xxx:9092,xxx:9092,xxx:9092"); props.put("zookeeper.connect", "xxx…

Exception in thread "main" java.util.InputMismatchException

今天写代码来了一个异常 /** * 需求分析:根据输入的天数是否是周六或是周日, * 并且天气的温度大于28摄氏度,则外出游泳,否则钓鱼 * @author chenyanlong * 日期:2017/10/14 */ package com.hp.test03; import java.util.Scanner; public class HS_JudgeOutgoing { public static void main(String[] args) { // TODO Auto-gener…

WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Exception in thread "main" java.io.IOException: No FileSystem for sc F

1.执行脚本程序报如下所示的错误: [hadoop@slaver1 script_hadoop]$ hadoop jar web_click_mr_hive.jar com.bie.hive.mr.ClickStreamThree /home/hadoop/data_hadoop/weblog/preprocess/output/-- /home/hadoop/data_hadoop/weblog/preprocess/click_pv_out/-- // :: WARN util.Native…