Admin: 1 версия

2010-06-01T05:20:15Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Tokenizing Java Source Code ==



<source lang="java">
import java.io.FileReader;
import java.io.StreamTokenizer;
public class Main {
public static void main(String[] argv) throws Exception {
FileReader rd = new FileReader("filename.java");
StreamTokenizer st = new StreamTokenizer(rd);
st.parseNumbers();
st.wordChars("_", "_");
st.eolIsSignificant(true);
st.ordinaryChars(0, " ");
st.slashSlashComments(true);
st.slashStarComments(true);
int token = st.nextToken();
while (token != StreamTokenizer.TT_EOF) {
token = st.nextToken();
switch (token) {
case StreamTokenizer.TT_NUMBER:
double num = st.nval;
System.out.println(num);
break;
case StreamTokenizer.TT_WORD:
String word = st.sval;
System.out.println(word);
break;
case """:
String dquoteVal = st.sval;
System.out.println(dquoteVal);
break;
case "\"":
String squoteVal = st.sval;
System.out.println(squoteVal);
break;
case StreamTokenizer.TT_EOL:
break;
case StreamTokenizer.TT_EOF:
break;
default:
char ch = (char) st.ttype;
System.out.println(ch);
break;
}
}
rd.close();
}
}</source>



== Using StreamTokenizer to count words and numbers in a file ==



<source lang="java">
import java.io.FileReader;
import java.io.StreamTokenizer;
public class Main {
public static void main(String[] args) throws Exception {
int wordCount = 0, numberCount = 0;
StreamTokenizer sTokenizer = new StreamTokenizer(new FileReader("yourFile.txt"));
while (sTokenizer.nextToken() != StreamTokenizer.TT_EOF) {
if (sTokenizer.ttype == StreamTokenizer.TT_WORD)
wordCount++;
else if (sTokenizer.ttype == StreamTokenizer.TT_NUMBER)
numberCount++;
}
System.out.println("Number of words in file: " + wordCount);
System.out.println("Number of numbers in file: " + numberCount);
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010