C:\Users\Administrator\workspace\chuanzhi\bin\com\c07016>java UdpSentException in thread "main" java.lang.NoClassDefFoundError: UdpSent (wrong name:
com/c07016/UdpSent)
at java.lang.ClassLoader.defineClass1(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$000(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)
Could not find the main class: UdpSent. Program will exit.
在myeclipse下运行正常,在cmd下编译通过,运行时就出现上述提示。
com/c07016/UdpSent)
at java.lang.ClassLoader.defineClass1(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$000(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)
Could not find the main class: UdpSent. Program will exit.
在myeclipse下运行正常,在cmd下编译通过,运行时就出现上述提示。
String ss = "I am a student,I come from tianjin";
String Keywords = ss.replaceAll("I[^(come)]come","")
.replaceAll("tianjin", "");
System.out.println(Keywords);
}
}
结果:I am a student, from
这个java中带有package,
所以 需要java xxx.UdpSent
java -cp ..\.. com.c07016.UdpSent或者退两级目录:
C:\Users\Administrator\workspace\chuanzhi\bin>java com.c07016.UdpSent