ObjectOutputStream.PutField putFields()
描述 (Description)
java.io.ObjectOutputStream.putFields()方法检索用于缓冲要写入流的持久字段的对象。 调用writeFields方法时,字段将写入流。
声明 (Declaration)
以下是java.io.ObjectOutputStream.putFields()方法的声明。
public ObjectOutputStream.PutField putFields()
参数 (Parameters)
NA
返回值 (Return Value)
此方法返回包含可序列化字段的Putfield类的实例。
异常 (Exception)
IOException - 如果发生I/O错误。
例子 (Example)
以下示例显示了java.io.ObjectOutputStream.putFields()方法的用法。
package com.iowiki;
import java.io.*;
public class ObjectOutputStreamDemo {
public static void main(String[] args) {
int i = 319874;
try {
// create a new file with an ObjectOutputStream
FileOutputStream out = new FileOutputStream("test.txt");
ObjectOutputStream oout = new ObjectOutputStream(out);
// write something in the file
oout.writeInt(i);
oout.writeInt(1653984);
// flush the stream
oout.flush();
// close the stream
oout.close();
// create an ObjectInputStream for the file we created before
ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));
// read and print an int
System.out.println("" + ois.readInt());
// read and print an int
System.out.println("" + ois.readInt());
} catch (Exception ex) {
ex.printStackTrace();
}
}
static public class Example implements Serializable {
private void writeObject(ObjectOutputStream out) throws IOException {
// write into the ObjectStreamField array the variable string
ObjectOutputStream.PutField fields = out.putFields();
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
319874
1653984