package test_4;
import static java.lang.System.out;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author xman
*/
public class T_2 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
int a = 5;
T2_Closure t = (new T2_Closure<Object, Void>() {
@Override
public Void callback(Object in) {
// 引用 a
out.printf("callback(%s)\n", a);
return null;
}
});
t.callback(null);
//------------------------------------
T2_Query q = new T2_Query();
q.query(new T2_Closure<T2_Query, Void>() {
@Override
public Void callback(T2_Query in) {
String res = in.name + " : " + a;
out.println(res);
return null;
}
});
}
}
//--------------------------------------
// 閉包
interface T2_Closure<T, E> {
public E callback(T in);
}
//--------------------------------------
class T2_Query {
String name = "xyz";
void query(T2_Closure closure) {
Thread th = new Thread(() -> {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
out.println(e);
}
closure.callback(T2_Query.this);
});
th.start();
out.println("thread start");
}
}
