Java語(yǔ)言提供了讀寫基本數(shù)據(jù)類型和對(duì)象的機(jī)制，本文將介紹如何在Java中使用這些機(jī)制。

Java中讀取基本數(shù)據(jù)類型的方法是使用輸入流讀取，寫入基本數(shù)據(jù)類型的方法是使用輸出流寫入。以下是一個(gè)簡(jiǎn)單的示例：

import java.io.*;
public class Test {
public static void main(String[] args) {
try {
// 寫入基本數(shù)據(jù)類型
OutputStream os = new FileOutputStream("data.txt");
DataOutputStream dos = new DataOutputStream(os);
dos.writeInt(123);
dos.writeDouble(3.14);
dos.writeBoolean(true);
dos.close();
os.close();
// 讀取基本數(shù)據(jù)類型
InputStream is = new FileInputStream("data.txt");
DataInputStream dis = new DataInputStream(is);
int i = dis.readInt();
double d = dis.readDouble();
boolean b = dis.readBoolean();
System.out.println("int: " + i + ", double: " + d + ", boolean: " + b);
dis.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

Java中讀寫對(duì)象的原理與讀寫基本數(shù)據(jù)類型的原理類似，只不過(guò)要使用對(duì)象序列化和反序列化機(jī)制來(lái)實(shí)現(xiàn)。以下是一個(gè)簡(jiǎn)單的示例：

import java.io.*;
public class Test {
public static void main(String[] args) {
try {
// 寫入對(duì)象
OutputStream os = new FileOutputStream("object.dat");
ObjectOutputStream oos = new ObjectOutputStream(os);
Person person = new Person("張三", 20);
oos.writeObject(person);
oos.close();
os.close();
// 讀取對(duì)象
InputStream is = new FileInputStream("object.dat");
ObjectInputStream ois = new ObjectInputStream(is);
Person p = (Person) ois.readObject();
System.out.println(p.getName() + ", " + p.getAge());
ois.close();
is.close();
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
}
}
class Person implements Serializable {
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
}