Java.io.FilterReader.skip()方法實例

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

下面的示例演示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面的程序，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