Java.io.FilterReader.skip() 方法
描述
java.io.FilterReader.skip(long n) 方法跳过 n 个字符。
声明
以下是 java.io.FilterReader.skip(long n) 方法的声明 −
public long skip(long n)
参数
n − 从流中跳过 n 个字符。
返回值
该方法返回实际跳过的字符数。
异常
IOException − 如果发生 I/O 错误。
示例
下面的例子展示了 java.io.FilterReader.skip(long n) 方法的使用。
package com.tutorialspoint;
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();
}
}
}
让我们编译并运行上面的程序,这将产生下面的结果 −
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