练习 2017-08-14 内存流/数组流
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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
//内存字节流/数组字节流
public class ByteArrayDemo {
public static void main(String[] args) throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
out.write("GFEDCBA".getBytes());
byte[] buffer = out.toByteArray();
System.out.println(new String(buffer));
ByteArrayInputStream in = new ByteArrayInputStream(buffer);
byte[] bs = new byte[5];
int len = -1;
while ((len = in.read(bs)) != -1) {
System.out.println(new String(bs, 0, len));
}
}
}
package memoryDemo;
import java.io.CharArrayReader;
import java.io.CharArrayWriter;
//内存字符流/数组字符流
public class CharArrayDemo {
public static void main(String[] args) throws Exception {
CharArrayWriter cw = new CharArrayWriter();
cw.write("故人西辞黄鹤楼,烟花三月下扬州。");
char[] ret = cw.toCharArray();
System.out.println(ret);
CharArrayReader cr = new CharArrayReader(ret);
char[] buffer = new char[1024];
int len = -1;
while((len = cr.read(buffer)) != -1){
System.out.println(new String(buffer,0,len));
}
}
}
package memoryDemo;
import java.io.StringReader;
import java.io.StringWriter;
//字符串流
public interface StringDemo {
public static void main(String[] args) throws Exception {
StringWriter sw = new StringWriter();
sw.write("孤帆远影碧空尽,唯见长江天际流。");
System.out.println(sw.toString());
StringReader sr = new StringReader(sw.toString());
char[] buffer = new char[1024];
int len = -1;
while((len = sr.read(buffer)) != -1){
System.out.println(new String(buffer,0,len));
}
}
}
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