Java中的 ByteArrayInputStream reset() 方法及示例
reset()方法是Java.io.ByteArrayInputStream的内置方法,由mark() 方法调用。它将输入流重新定位到标记的位置。
语法:
public void reset()
参数:该函数不接受任何参数。
返回值:该函数不返回任何内容。
下面是上述函数的实现:
方案一:
Java
// Java program to implement
// the above function
import java.io.*;
public class Main {
public static void main(String[] args) throws Exception
{
byte[] buf = { 5, 6, 7, 8, 9 };
// Create new byte array input stream
ByteArrayInputStream exam
= new ByteArrayInputStream(buf);
// print bytes
System.out.println(exam.read());
System.out.println(exam.read());
System.out.println(exam.read());
// Use of reset() method :
// repositioning the stream to marked positions.
exam.reset();
System.out.println("\nreset() invoked");
System.out.println(exam.read());
System.out.println(exam.read());
}
}
Java
// Java program to implement
// the above function
import java.io.*;
public class Main {
public static void main(String[] args) throws Exception
{
byte[] buf = { 1, 2, 3, 4 };
// Create new byte array input stream
ByteArrayInputStream exam
= new ByteArrayInputStream(buf);
// print bytes
System.out.println(exam.read());
System.out.println(exam.read());
System.out.println(exam.read());
exam.mark(1);
// Use of reset() method :
// repositioning the stream to marked positions.
exam.reset();
System.out.println("\nreset() invoked");
System.out.println(exam.read());
System.out.println(exam.read());
}
}
输出:
5
6
7
reset() invoked
5
6
方案二:
Java
// Java program to implement
// the above function
import java.io.*;
public class Main {
public static void main(String[] args) throws Exception
{
byte[] buf = { 1, 2, 3, 4 };
// Create new byte array input stream
ByteArrayInputStream exam
= new ByteArrayInputStream(buf);
// print bytes
System.out.println(exam.read());
System.out.println(exam.read());
System.out.println(exam.read());
exam.mark(1);
// Use of reset() method :
// repositioning the stream to marked positions.
exam.reset();
System.out.println("\nreset() invoked");
System.out.println(exam.read());
System.out.println(exam.read());
}
}
输出:
1
2
3
reset() invoked
4
-1
参考: https: Java/io/ByteArrayInputStream.html#reset()