}
}
}
[java]
import java.io.*;
public class TestFileWriter2 {
public static void main(String[] args) throws Exception {
FileReader fr = new FileReader("d:/java/io/TestFileWriter2.java");
FileWriter fw = new FileWriter("d:/java/io/TestFileWriter2.bak");
int b;
while((b = fr.read()) != -1) {
fw.write(b);
}
fr.close();
fw.close();
}
}
import java.io.*;
public class TestFileWriter2 {
public static void main(String[] args) throws Exception {
FileReader fr = new FileReader("d:/java/io/TestFileWriter2.java");
FileWriter fw = new FileWriter("d:/java/io/TestFileWriter2.bak");
int b;
while((b = fr.read()) != -1) {
fw.write(b);
}
fr.close();
fw.close();
}
}
[java]
import java.io.*;
public class TestFileReader {
public static void main(String[] args) {
FileReader fr = null;
int c = 0;
try {
fr = new FileReader("d:\\share\\java\\io\\TestFileReader.java"); // 从这个文件中 读取 数据。按字符
int ln = 0;
while ((c = fr.read()) != -1) {
//char ch = (char) fr.read();
System.out.print((char)c);
//if (++ln >= 100) { System.out.println(); ln = 0;}
}
fr.close();
} catch (FileNotFoundException e) {
System.out.println("找不到指定文件");
} catch (IOException e) {
System.out.println("文件读取错误");
}
}
}
import java.io.*;
public class TestFileReader {
public static void main(String[] args) {
FileReader fr = null;
int c = 0;
try {
fr = new FileReader("d:\\share\\java\\io\\TestFileReader.java"); // 从这个文件中 读取 数据。按字符
int ln = 0;
while ((c = fr.read()) != -1) {
//char ch = (char) fr.read();
System.out.print((char)c);
//if (++ln >= 100) { System.out.println(); ln = 0;}
}
fr.close();
} catch (FileNotFoundException e) {
System.out.println("找不到指定文件");
} catch (IOException e) {
System.out.println("文件读取错误");
}
}
}
[java]
import java.io.*;
public class TestDataStream {
public static void main(String[] args) {
ByteArrayOutputStream baos =
new ByteArrayOutputStream(); // 准备往里写数据
DataOutputStream dos =
new DataOutputStream(baos); // 再套一层 管道。
try {
dos.writeDouble(Math.random());
dos.writeBoolean(true);
ByteArrayInputStream bais =
new ByteArrayInputStream(baos.toByteArray());
System.out.println(bais.available());
DataInputStream dis = new DataInputStream(bais);
System.out.println(dis.readDouble());
System.out.println(dis.readBoolean());
dos.close(); dis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
import java.io.*;
public class TestDataStream {
public static void main(String[] args) {
ByteArrayOutputStream baos =
new ByteArrayOutputStream(); // 准备往里写数据
DataOutputStream dos =
new DataOutputStream(baos); // 再套一层 管道。
try {
dos.writeDouble(Math.random());
dos.writeBoolean(true);
ByteArrayInputStream bais =
new ByteArrayInputStream(baos.toByteArray());
System.out.println(bais.available());
DataInputStream dis = new DataInputStream(bais);
System.out.println(dis.readDouble());
System.out.p