我在运行helloworld时出错
public class HelloWorld{
public static void main(String[] args){
System.out.println("Hello,World!");
}
}
D:\javatest>javac HelloWorld.javaD:\javatest>java HelloWorld
Exception in thread "main" java.lang.UnsupportedClassVersionError: HelloWorld (U
nsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)我的环境变量设置如下:
D:\javatest>
JAVA_HOME
C:\jdk1.5.0
classpath
.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
path
%JAVA_HOME%\bin
请问是什么原因?我改怎么改。
public class HelloWorld{
public static void main(String[] args){
System.out.println("Hello,World!");
}
}
D:\javatest>javac HelloWorld.javaD:\javatest>java HelloWorld
Exception in thread "main" java.lang.UnsupportedClassVersionError: HelloWorld (U
nsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)我的环境变量设置如下:
D:\javatest>
JAVA_HOME
C:\jdk1.5.0
classpath
.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
path
%JAVA_HOME%\bin
请问是什么原因?我改怎么改。
就是说这些配置必须是在相应其他配置的前面测试时在输入javac,能正确显示java编译命令的就是配置正确了
classpath .;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
path %JAVA_HOME%\bin