你要卸载掉旧版本的JDK,这样剩余的java -version 和 javac -version 版本就能保持一致了。 怎么卸载? 方法一:手动卸载,不好控制 方法二:java官网有专门的卸载工具,这个比较好用! 地址:https://www.java.com/zh_CN/download/faq/remove_olderversions.xml 注意:最后你要自己检查一下的环境变量哦!
运行Java程序,javac运行.java文件没有报错,但java运行的时候报错 仔细看一下报错 Exception in thread "main" java.lang.UnsupportedClassVersionError: helloworld has been compiled by a more recent version of the Java Runtime (class file version 54.0), this version of the Java Runtime only recognizes ...
Java Runtime error: java.lang.NoSuchMethodError: CheckUserActivity.getActionBar 解决方法: import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; ActionBar actionBar = getSupportActionBar();
完成上述配置后,再次在命令行界面输入以下命令验证 Java 环境变量配置情况: java-version 1. 如果你仍然遇到错误信息Not able to find Java executable or version. Please check your Java installation.,则可能是因为 Java 可能未正确安装或者安装过程中出现问题。 其他可能的问题 如果你已经正确安装和配置了 Java,...
run 命令 本地模式语法 Java 模式语法 runargs 命令 语法 save 命令 语法 scopes 命令 语法 search 命令 语法 showblock 命令 语法 showleaks 命令 语法 showmemuse 命令 语法 source 命令 语法 status 命令 语法 示例 step 命令 本地模式语法 Java 模式语法 stepi 命令 语法 stop 命令 语法 本地模式语法 Java...
Checking Java Version To find out which Java version is installed on your system, run the java -version command:java -versionCopy The command will display the default Java version: openjdk 11.0.8 2020-07-14 OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu120.04) OpenJDK ...
To check Java version on a Mac via graphical user interface follow the steps mentioned below: Step 1: Open System Preferences SelectSystem Preferencesfrom the menu after clicking the Apple icon: Step 2: Access Java Control Panel If Java Runtime Environment (JRE) is installed on Mac then you ...
I don't understand something. When I download the latest version of Java from their page, in the control meny it says Java runtime version "1.8. some numbers", and with that installed, if you type "java -version" in cmd, it tells you "version 23.0.1". So what am I missing?
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/teamcenter/hello/Hello has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0 ...
Java.Security.Cert Java.Security.Interfaces Java.Security.Spec Java.Sql Java.Text Java.Time Java.Time.Chrono Java.Time.Format Java.Time.Temporal Java.Time.Temporal ChronoField ChronoField 属性 方法 AdjustInto CheckValidIntValue CheckValidValue