Java语言深入 文件和流(3)

import java.io.*;
class Student implements Serializable{
private String name;
private int age;
public Student(String name,int age){
this.name=name;
this.age=age;
}
public void greeting(){
System.out.println("hello ,my name is "+name);
}
public String toString(){
return "Student["+name+","+age+"]";
}
}
public class ObjectOutTest{
public static void main(String args[]){
ObjectOutputStream oos=null;
try{
oos=new ObjectOutputStream(
new FileOutputStream("student.txt"));
Student s1=new Student("Jerry",24);
Student s2=new Student("Andy",33);
oos.writeObject(s1);
oos.writeObject(s2);
}catch(Exception e){
e.printStackTrace();
}finally{
if(oos!=null)
try{
oos.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
}
import java.io.*;
public class ObjectInTest{
public static void main(String args[]){
ObjectInputStream ois=null;
Student s=null;
try{
ois=new ObjectInputStream(
new FileInputStream("student.txt"));
System.out.println("--------------------");
s=(Student)ois.readObject();
System.out.println(s);
s.greeting();
System.out.println("--------------------");
s=(Student)ois.readObject();
System.out.println(s);
s.greeting();
}catch(Exception e){
e.printStackTrace();
}finally{
if(ois!=null)
try{
ois.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
}

import java.io.*;
public class PrintWriterTest{
public static void main(String args[]){
PrintWriter pw=null;
try{
pw=new PrintWriter(
new OutputStreamWriter(
new FileOutputStream("bufferedwriter.txt")));
pw.println("hello world");
}catch(Exception e){
e.printStackTrace();
}finally{
if(pw!=null)
try{
pw.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
}
import java.io.*;
public class BufferedReaderTest{
public static void main(String args[]){
BufferedReader br=null;
try{
br=new BufferedReader(
new InputStreamReader(
new FileInputStream("bufferedwriter.txt")));
System.out.println(br.readLine());
}catch(Exception e){
e.printStackTrace();
}finally{
if(br!=null)
try{
br.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
}