package 内存流;

 import java.io.ByteArrayInputStream;

 import java.io.ByteArrayOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.OutputStream;

 public class Test {

     public static void main(String[] args) throws IOException {

         String str="Hello World!中国好国国国。";

         InputStream in=new ByteArrayInputStream(str.getBytes());

         OutputStream out=new ByteArrayOutputStream();

         int tmp=0;

         while((tmp=in.read())!=-1)

             out.write(Character.toUpperCase(tmp));

         System.out.println(out);//HELLO WORLD!中冠好冠冠冠。

         //中文有乱码！！！

         in.close();

         out.close();

     }

 }

 package 内存流;

 import java.io.CharArrayReader;

 import java.io.CharArrayWriter;

 import java.io.IOException;

 import java.io.Reader;

 import java.io.Writer;

 public class Test {

     public static void main(String[] args) throws IOException {

         String str="Hello World!中国好国国国。";

         Reader in=new CharArrayReader(str.toCharArray());

         Writer out=new CharArrayWriter();

         int tmp=0;

         while((tmp=in.read())!=-1)

             out.write(Character.toUpperCase(tmp));

         System.out.println(out);//HELLO WORLD!中国好国国国。

         //字符流处理中文无乱码！！！

         in.close();

         out.close();

     }

 }

 package 内存流;

 import java.io.*;

 public class Test {

     public static void main(String[] args) throws IOException {

         File[] files={

                 new File("D:"+File.separator+"testA.txt"),

                 new File("D:"+File.separator+"testB.txt"),

         };

         Reader[] ins={

                     new FileReader(files[0]),

                     new FileReader(files[1])

         };

         Writer out=new CharArrayWriter();

         int tmp=0;

         while((tmp=ins[0].read())!=-1)

             out.write(tmp);

         while((tmp=ins[1].read())!=-1)

             out.write(tmp);

         System.out.println(out.toString());

 //        System.out.println(new String(out.toCharArray()));

         //字节内存输出流ByteArrayOutputStream下有个类似的toByteArray()方法

         ins[0].close();

         ins[1].close();

         out.close();

     }

 }