qq_42448476的博客

先通过实现Connection接口来完成一个普通的数据库连接实现 import java.sql.Array; import java.sql.Blob; import java.sql.CallableStatement; import java.sql.Clob; import java.sql.Connection; import java.sql.DatabaseMetaData; i...

public class UseFuture { /*实现Callable接口，允许有返回值*/ private static class UseCallable implements Callable<Integer>{ private int sum; @Override public Integer call() throws Exception { ...

public class FindDirsFiles extends RecursiveAction{ private File path;//当前任务需要搜寻的目录 public FindDirsFiles(File path) { this.path = path; } public static void main(String [] ...

public class VolatileUnsafe { private static class VolatileVar implements Runnable { private volatile int a = 0; @Override public void run() { String threadName = Thread.curr...

守护线程是非守护线程的“助理”，只要jvm中存在非守护线程，则守护线程就存在，例如负责垃圾回收的线程，而当所有非守护线程执行完毕后，则守护线程也随之结束，不同生但共死 public class DaemonThread { private static class UseThread extends Thread { @Override public void run() { ...