void quoteChar(int ch)
描述 (Description)
java.io.StreamTokenizer.quoteChar(int ch)方法指定此字符的匹配对在此标记生成器中分隔字符串常量。
当nextToken方法遇到字符串常量时,ttype字段设置为字符串分隔符,sval字段设置为字符串的主体。
如果遇到字符串引号字符,则识别字符串,包括字符串引号字符后的所有字符(但不包括),最后(但不包括)相同字符串引号字符的下一次出现,或行终止符,或文件结束。 通常的转义序列(如“\ n”和“\ t”)会被识别,并在解析字符串时转换为单个字符。
清除指定字符的任何其他属性设置。
声明 (Declaration)
以下是java.io.StreamTokenizer.quoteChar()方法的声明。
public void quoteChar(int ch)
参数 (Parameters)
ch - 角色。
返回值 (Return Value)
此方法不返回值。
异常 (Exception)
NA
例子 (Example)
以下示例显示了java.io.StreamTokenizer.quoteChar()方法的用法。
package com.iowiki;
import java.io.*;
public class StreamTokenizerDemo {
public static void main(String[] args) {
String text = "Hello. This is a text \n that will be split "
+ "into tokens. 1 + 1 = 2";
try {
// create a new file with an ObjectOutputStream
FileOutputStream out = new FileOutputStream("test.txt");
ObjectOutputStream oout = new ObjectOutputStream(out);
// write something in the file
oout.writeUTF(text);
oout.flush();
// create an ObjectInputStream for the file we created before
ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));
// create a new tokenizer
Reader r = new BufferedReader(new InputStreamReader(ois));
StreamTokenizer st = new StreamTokenizer(r);
// specify o as a quote char
st.quoteChar('o');
// print the stream tokens
boolean eof = false;
do {
int token = st.nextToken();
switch (token) {
case StreamTokenizer.TT_EOF:
System.out.println("End of File encountered.");
eof = true;
break;
case StreamTokenizer.TT_EOL:
System.out.println("End of Line encountered.");
break;
case StreamTokenizer.TT_WORD:
System.out.println("Word: " + st.sval);
break;
case StreamTokenizer.TT_NUMBER:
System.out.println("Number: " + st.nval);
break;
default:
System.out.println((char) token + " encountered.");
if (token == '!') {
eof = true;
}
}
} while (!eof);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
Word: AHell
o encountered.
Word: that
Word: will
Word: be
Word: split
Word: int
o encountered.
Word: kens.
Number: 1.0
+ encountered.
Number: 1.0
= encountered.
Number: 2.0
End of File encountered.