publicList<ChannelPojo> queryAllChannels(String areaCode) throws IMException{ List<String> exceptChannelList =newArrayList<String>(); if(StringUtils.isNotBlank(areaCode) &&"820200".equals(areaCode)){ exceptChannelList.add("10"); exceptChannelList.add("20"); }elseif(StringUtils.isNotBlank(areaC...
Java Oracle Java is the #1 programming language and development platform. It reduces costs, shortens development timeframes, drives innovation, and improves application services. Java continues to be the development platform of choice for enterprises and developers....
"banana","cherry","date","orange");// 不在范围内的元素集合List<String>notInList=Arrays.asList("banana","date");// 遍历原始List,判断元素是否不在指定范围内,如果是则加入新List中for(Stringitem:originalList){if(!notInList.contains(item)...
IfDemo03.java public class IfDemo03 { public staticvoid main(String[] args) { int grade = 75; //定义学生成绩 if (grade > 80) { // 满足条件 grade > 80 System.out.println("该成绩的等级为优"); } else if(grade > 70) { // 不满足条件 grade > 80 ,但满足条件 grade >...
The Graal team is pleased to announce the general availability of Oracle GraalVM for JDK 23. In addition to JDK 23 support, this release includes many enhancements to Native Image ahead-of-time compilation to tune a generated executable’s size, memory usage, and throughput. This release is al...
if(message==null||message.equls("")){thrownewIllegalArgumentException("输入信息错误!");} 用Assert工具类上面的代码可以简化为:Assert.hasText((message, "输入信息错误!"); 下面介绍常用的断言方法的使用: 代码语言:javascript 代码运行次数:0 运行 ...
If the list is variable-size the programmer must additionally override the add(int, E) and remove(int) methods. The programmer should generally provide a void (no argument) and collection constructor, as per the recommendation in the Collection interface specification. Unlike the other abstract...
publicEpop(){if(size==0)returnnull;elsereturn(E)elementData[--size];} 实现起来非常简单,但是却存在着内存泄露的问题,因为 size 变小导致 ArrayList 中原有的末端元素将永远得不到使用,但是由于容器持有着他们的引用,他们也永远得不到释放。 4.2. 改进 ...
Oracle Java 是第一大编程语言和开发平台。它有助于企业降低成本、缩短开发周期、推动创新以及改善应用程序服务。Java 现在仍是企业和开发人员的首选开发平台。 用于运行桌面应用程序的 Java 面向使用台式机和笔记本电脑的最终用户 下载适用于台式机的 Java
public static void setValueIfNotBlank(String target, String source) { if (isNotBlank(source)) { target = source; } } /** * 转换为JS获取对象值,生成三目运算返回结果 * * @param objectString 对象串 * 例如:row.user.id * 返回:!row?'':!row.user?'':!row.user.id?'':row.user.id ...