Java Thread getContextClassLoader()方法

Thread類的getContextClassLoader()方法返回線程的上下文ClassLoader。

語法

public ClassLoader getContextClassLoader()

返回

• 它返回線程的上下文ClassLoader。

異常

• SecurityException:如果當前線程無法獲取上下文ClassLoader。

示例

public class JavaGetClassLoaderExp implements Runnable
{
    public void run()
    {
        System.out.println("Thread is running");
    }
    public static void main(String args[])
    {
        JavaGetClassLoaderExp g1 = new JavaGetClassLoaderExp();
        Thread t1 = new Thread(g1);
        // call run() method
        t1.start();

        // returns the context ClassLoader for thread t1
        ClassLoader loader = t1.getContextClassLoader();
        // sets the context ClassLoader for thread t1
        t1.setContextClassLoader(loader);
        System.out.println("Context ClassLoader = " + loader);
        System.out.println("Parent = " + loader.getParent());
        System.out.println("Class = " + loader.getClass());
    }
}

執行上面示例代碼，得到以下結果:

Context ClassLoader = jdk.internal.loader.ClassLoaders$AppClassLoader@7c53a9eb
Parent = jdk.internal.loader.ClassLoaders$PlatformClassLoader@ed17bee
Class = class jdk.internal.loader.ClassLoaders$AppClassLoader
Thread is running