AutoCloseableTest.java

package norainu;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

// AutoClosable
public class Main {
    public int b;

    public static void main(String[] args) {
        try (ACTest a = new ACTest()) {
            a.methodA();
        }

        try (FileInputStream is2 = new FileInputStream("C:/tmp/a.txt"); FileOutputStream os2 = new FileOutputStream("C:/tmp/a2.txt")) {
            InputStreamReader ir2 = new InputStreamReader(is2, "UTF-8");
            OutputStreamWriter ow2 = new OutputStreamWriter(os2, "UTF-8");
            int tmp;
            while ((tmp = ir2.read()) != -1) {
                ow2.write(tmp);
            }
            ow2.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class ACTest implements AutoCloseable {
    @Override
    public void close() {
        System.out.println("autoclosable");
    }

    public void methodA() {
        System.out.println("methodA");
    }
}