java.io.FilterReader.skip(long n) 方法跳過n個字符數。

聲明

以下是 java.io.FilterReader.skip(long n)方法的聲明：

public long skip(long n)

參數

• n -- 從流跳過n個字符數。

返回值

該方法返回實際跳過的字符數。

異常

• IOException -- 如果發生I/ O錯誤。

例子

下麵的示例演示java.io.FilterReader.skip(long n)方法的用法。

package com.yiibai;

import java.io.FilterReader;
import java.io.Reader;
import java.io.StringReader;

public class FilterReaderDemo {
   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();
      }
   }
}

讓我們編譯和運行上麵的程序，這將產生以下結果：

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