Java.io.StreamTokenizer.quoteChar()方法實例
java.io.StreamTokenizer.quoteChar(int ch) 方法指定的匹配對字符的分隔字符串常量在此標記生成器。
當nextToken方法遇到一個字符串常量,則ttype字段中被設定爲字符串分隔符和sval字段被設置爲字符串的主體。如果一個字符串引號字符時,則字符串被識別,包括所有字符後(但不包括)該字符串引號字符,直到(但不包括)相同的字符串引號字符,或行結束的下一個出現文件,或結束。通常的轉義序列,如「 」和「 」的確認,並轉換成單個字符的字符串進行分析。
指定字符的任何其他屬性設置將被清除。
聲明
以下是java.io.StreamTokenizer.quoteChar()方法的聲明
public void quoteChar(int ch)
參數
- ch -- 字符
返回值
這個方法沒有返回值
異常
- NA
例子
下面的示例演示java.io.StreamTokenizer.quoteChar()方法的用法。
package com.yiibai; import java.io.*; public class StreamTokenizerDemo { public static void main(String[] args) { String text = "Hello. This is a text
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(); } } }
讓我們編譯和運行上面的程序,這將產生以下結果:
Word: Hell 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.