import org.apache.lucene.analysis.CharacterUtils; //导入依赖的package包/类
@Override
public final boolean incrementToken() throws IOException {
	if (input.incrementToken()) {
		CharacterUtils.toLowerCase(termAtt.buffer(), 0, termAtt.length());
		return true;
	} else
		return false;
}
 

import org.apache.lucene.analysis.CharacterUtils; //导入依赖的package包/类
public CharBufferReader(Reader input, int bufferSize) {
    this.input = input;
    this.bufferSize = bufferSize;
    charBuffer = CharacterUtils.newCharacterBuffer(bufferSize);
}
 

import org.apache.lucene.analysis.CharacterUtils; //导入依赖的package包/类
private boolean readToBuffer() throws IOException {
    CharacterUtils.fill(charBuffer, input);
    readCursor = charBuffer.getOffset();
    return charBuffer.getLength() > charBuffer.getOffset();
}
 

import org.apache.lucene.analysis.CharacterUtils; //导入依赖的package包/类
public void reset(Reader input) {
    this.input = input;
    readCursor = 0;
    charBuffer = CharacterUtils.newCharacterBuffer(bufferSize);
}