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Java IO InputStreamReader

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//¶ÁÈ¡Îı¾
InputStream in = new FileInputStream("allfilename");
InputStreamReader isr = new InputStreamReader(in, charsetName);
BufferedReader br = new BufferedReader(isr);
//дÎı¾
OutputStream out = new FileOutputStream("allfilename");
out.write("string×Ö·û´®".getBytes("gbk"));

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package egtl.test;
import java.io.File;
import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
public class FileDeleter extends TimerTask {
    private stati ......

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package reflection;
public interface HelloWorld {
    void sayHelloWorld();
    void testHello(String hello);
}
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package reflection;
public class HelloWorldImpl implements HelloWorld {
 public void sayHelloWorld() {
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