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import java.io.*;
class ByteArrayOutputStreamDemo {
public static void main(String args[]) throws IOException {
ByteArrayOutputStream f = new ByteArrayOutputStream();
String s = "This should end up in the array";
byte buf[] = s.getBytes();
f.write(buf);
System.out.println("Buffer as a string");
System.out.println(f.toString());
System.out.println("Into array");
byte b[] = f.toByteArray();
for (int i=0; i<b.length; i++) {
System.out.print((char) b[i]);}
System.out.println("\nTo an OutputStream()");
//Êä³öµ½Îļþtest.txtÖÐ
OutputStream f2 = new FileOutputStream("test.txt");
f.writeTo(f2);
f2.close();
System.out.println("Doing a reset");
f.reset();
for (int i=0; i<3; i++)
f.write('X');
System.out.println(f.toString());}}
//×Ö·ûÁ÷µÄÀý×Ó£¬ÒÔReaderÓëWriterΪ»ù´¡Àà
import java.io.*;
public class CharArrayReaderDemo {
public static void main(String args[]) throws IOException {
String tmp = "abcdefghijklmnopqrstuvwxyz";
int length = tmp.length();
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package cf.java.study.java.io;
import java.io.File;
import java.io.FileInputStream;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class FileTests {
@Before
public void set ......
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