Java FilterReader skip()方法

java.io.FilterReader.skip(long n) 方法跳过n个字符数。

1 语法

public long skip(long n)

2 参数

n：从流中跳过n个字符。

3 返回值

该方法返回实际跳过的字符数。

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.io.FilterReader.skip(long n)方法的例子
 */
import java.io.FilterReader;
import java.io.Reader;
import java.io.StringReader;

public class Demo {
    public static void main(String[] args) throws Exception {
        FilterReader fr = null;
        Reader r = null;
        int i = 0;
        long l = 0l;
        char c;

        try {
            // create new reader
            r = new StringReader("ABCDEFGHIJKLMNOPQRSTUVWXYZ");

            // create new filter reader
            fr = new FilterReader(r) {
            };

            // read till the end of the filter reader
            while((i = fr.read())!=-1) {

                // convert integer to character
                c = (char)i;

                // prints
                System.out.println("Character read: "+c);

                // number of characters actually skipped
                l = fr.skip(2);

                // prints
                System.out.println("Character skipped: "+l);
            }

        } catch(Exception e) {
            // if any I/O error occurs
            e.printStackTrace();
        } finally {
            // releases system resources associated with this stream
            if(r!=null)
                r.close();
            if(fr!=null)
                fr.close();
        }
    }
}

输出结果为：

Character read: A
Character skipped: 2
Character read: D
Character skipped: 2
Character read: G
Character skipped: 2
Character read: J
Character skipped: 2
Character read: M
Character skipped: 2
Character read: P
Character skipped: 2
Character read: S
Character skipped: 2
Character read: V
Character skipped: 2
Character read: Y
Character skipped: 1