線程類的 setContextClassLoader() 方法為線程設置上下文類加載器。可以在創建線程時設置上下文 ClassLoader。它允許線程的創建者在加載類和資源時通過 getContextClassLoader 向線程中運行的代碼提供適當的類加載器。
用法
public void setContextClassLoader(ClassLoader cl)
參數
cl:它是線程的上下文類加載器
返回
它不返回任何值。
異常
SecurityException: 如果當前線程無法設置上下文 ClassLoader。
示例
public class JavaSetClassLoaderExp implements Runnable
{
public void run()
{
System.out.println("Thread is running");
// returns the context ClassLoader for currently running thread
ClassLoader loader = Thread.currentThread().getContextClassLoader();
// sets the context ClassLoader for currently running thread
Thread.currentThread().setContextClassLoader(loader);
System.out.println("Context ClassLoader = " + loader);
}
public static void main(String args[])
{
JavaSetClassLoaderExp g1 = new JavaSetClassLoaderExp();
Thread t1 = new Thread(g1);
// call run() method
t1.start();
}
}
輸出:
Thread is running Context ClassLoader = [email protected]
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