爲什麼下面的代碼會導致ClassNotFoundException
?爲什麼無法加載內部類? ClassNotFoundException
public class App02 {
public static class A {
}
public static void main(String[] args) throws ClassNotFoundException {
try {
System.out.println("A.class.getCanonicalName() = " + A.class.getCanonicalName());
Class c = Class.forName("tests.App02.A"); //error on this line
System.out.println(c.getName());
}
catch(Exception e) {
e.printStackTrace();
}
}
}
輸出:
A.class.getCanonicalName() = tests.App02.A
java.lang.ClassNotFoundException: tests.App02.A
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at tests.App02.main(App02.java:15)
如果你有一個包'tests.App02'在它的一類'A'我應該'Class.forName'回報? –
如果我有帶'$'符號的名字,應該返回什麼? :) –
它實際上可以在Java中調用一個類'$'!!爲什麼,哦,人性! –