Home
>
Archives
>
JVM ClassLoaderTest
JVM ClassLoaderTest
Publish:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
| package com.test.demo;
import java.io.IOException;
import java.io.InputStream;
public class ClassLoaderTest {
public static void main(String[] args) throws Exception{
ClassLoader myLoader = new ClassLoader() {
@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
try {
String fileName = name.substring(name.lastIndexOf(".")+1)+".class";
InputStream is = getClass().getResourceAsStream(fileName);
if (is == null) {
return super.loadClass(name);
}
byte[] b = new byte[is.available()];
is.read(b);
return defineClass(name, b, 0, b.length);
}catch (IOException e) {
throw new ClassNotFoundException(name);
}
}
};
Object obj = myLoader.loadClass("com.test.demo.ClassLoaderTest").newInstance();
System.out.println(obj.getClass());
System.out.println(obj instanceof ClassLoaderTest);
}
}
|
声明: 本文采用 BY-NC-SA 授权。转载请注明转自: Ding Bao Guo