org.aoju.bus.core.collection

Class LineIter

java.lang.Object

org.aoju.bus.core.collection.LineIter

All Implemented Interfaces:

Closeable, Serializable, AutoCloseable, Iterable<String>, Iterator<String>

public class LineIter
extends Object
implements Iterator<String>, Iterable<String>, Closeable, Serializable

将Reader包装为一个按照行读取的Iterator 此对象遍历结束后,应关闭之,推荐使用方式:

Since:

JDK 1.8+

Version:

5.8.2

Author:

Kimi Liu

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LineIter(InputStream in, Charset charset) 构造
LineIter(Reader reader) 构造

Method Summary

Modifier and Type	Method and Description
void	close() 关闭Reader
boolean	hasNext() 判断Reader是否可以存在下一行.
protected boolean	isValidLine(String line) 重写此方法来判断是否每一行都被返回,默认全部为true
Iterator<String>	iterator()
String	next() 返回下一行内容
String	nextLine() 返回下一行
void	remove() 不支持移除

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

forEachRemaining

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

LineIter

public LineIter(InputStream in,
                Charset charset)
         throws IllegalArgumentException

构造

Parameters:

in - InputStream

charset - 编码

Throws:

IllegalArgumentException - reader为null抛出此异常

LineIter

public LineIter(Reader reader)
         throws IllegalArgumentException

构造

Parameters:

reader - Reader对象,不能为null

Throws:

IllegalArgumentException - reader为null抛出此异常

Method Detail

hasNext

public boolean hasNext()
                throws InstrumentException

判断Reader是否可以存在下一行.

Specified by:

hasNext in interface Iterator<String>

Returns:

true 表示有更多行

Throws:

InstrumentException - 内部异常

next

public String next()
            throws NoSuchElementException

返回下一行内容

Specified by:

next in interface Iterator<String>

Returns:

下一行内容

Throws:

NoSuchElementException - 没有新行

nextLine

public String nextLine()
                throws NoSuchElementException

返回下一行

Returns:

下一行

Throws:

NoSuchElementException - 没有更多行

close

public void close()

关闭Reader

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

remove

public void remove()

不支持移除

Specified by:

remove in interface Iterator<String>

Throws:

UnsupportedOperationException - 始终抛出此异常

isValidLine

protected boolean isValidLine(String line)

重写此方法来判断是否每一行都被返回,默认全部为true

Parameters:

line - 需要验证的行

Returns:

是否通过验证

iterator

public Iterator<String> iterator()

Specified by:

iterator in interface Iterable<String>