Java StreamTokenizer nval
Syntax
StreamTokenizer.nval has the following syntax.
public double nval
Example
In the following code shows how to use StreamTokenizer.nval field.
/* w ww . j a va2 s .com*/
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.StreamTokenizer;
public class Main {
public static void main(String args[]) {
try {
// Create a file reader
FileReader fr = new FileReader(args[0]);
// Create a buffered reader
BufferedReader br = new BufferedReader(fr);
// Create a stream tokenizer
StreamTokenizer st = new StreamTokenizer(br);
// Process tokens
while (st.nextToken() != StreamTokenizer.TT_EOF) {
switch (st.ttype) {
case StreamTokenizer.TT_WORD:
System.out.println(st.lineno() + ") " + st.sval);
break;
case StreamTokenizer.TT_NUMBER:
System.out.println(st.lineno() + ") " + st.nval);
break;
default:
System.out.println(st.lineno() + ") " + (char) st.ttype);
}
}
// Close file reader
fr.close();
} catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
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