void ordinaryChar(int ch)
描述 (Description)
java.io.StreamTokenizer.ordinaryChar(int ch)方法指定此标记生成器中的字符参数为“普通”。 它删除了角色作为注释字符,单词组件,字符串分隔符,空格或数字字符的任何特殊含义。 当解析器遇到这样的字符时,解析器将其视为单字符标记,并将ttype字段设置为字符值。
使行终止符字符“普通”可能会干扰StreamTokenizer计算行的能力。 lineno方法可能不再反映其行计数中存在此类终结符字符。
声明 (Declaration)
以下是java.io.StreamTokenizer.ordinaryChar()方法的声明。
public void ordinaryChar(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.ordinaryChar()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);
// set \n as an ordinary char
st.ordinaryChar('\n');
// 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: AHello.
Word: This
Word: is
Word: a
Word: text
End of Line encountered.
Word: that
Word: will
Word: be
Word: split
Word: into
Word: tokens.
Number: 1.0
+ encountered.
Number: 1.0
= encountered.
Number: 2.0
End of File encountered.