获取map的key和value的方法分为两种形式: map.keySet():先获取map的key,然后根据key获取对应的value: map..entrySet():同时查询map的key和value,只需要查询一次: 两者的性能比较可以查看map.keySet()和map.EntrySet()的比较. 以下是获取map的key和value,以及map里面的元素通过key或者value来比较大小并排序: 注意:当map的value值相等时,根据key值进行排序 public class Ma
java -jar yxCollector-1.1.0.jarError: opening registry key 'Software\JavaSoft\Java Runtime Environment'Error: could not find java.dllError: Could not find Java SE Runtime Environment.
C:\Users\huxxxxchan>javaError: opening registry key 'Software\JavaSoft\Java Runtime Environment'Error: could not find java.dllError: Could not find Java SE Runtime Environment. solution: http://stackoverflow.com/questions/6362037/java-error-opening-r
重装系统后发现jdk没有了,重新安装了,装一个其实挺容易的,但是“java -version”回车的时候,“啪”,error: Error opening registry key'software\Javasoft\Java Runtime Environment'Error: could not find java.dllError: could not find Java 2 Runtime Environment' 怎么会这样子,于是度娘~找到了好几种解决方法,但是每人的电脑不同,方法不
启动eclipse出现“Error opening registry key 'software\Javasoft\Java Runtime Environment'”,“java was started but returned code=2”. 错误截图: 输入命令行java -version,显示一下错误. 解决方案: 以管理员的身份删除C:\Windows\System32目录下的javaw.exe.java.exe的文件 删除javaw.exe.java.exe文件后,再次输入命令行j
cmd下输入 java命令时出现该错误: Error: Registry key 'Software\JavaSoft\Java Runtimehas value '1.8', but '1.7' is required.Error: could not find java.dllError: Could not find Java SE Runtime Environment. 错误原因:新安装的JDK8,会复制到 C:\Windows\System32 下 java.exe,javaw.ex