65 lines
1.7 KiB
Java
65 lines
1.7 KiB
Java
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Reading Key board Input
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import java.io.*;
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class Tokenize {
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public static void main(String[] args) {
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System.out.println("Enter some numbers and words.");
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StreamTokenizer st = new StreamTokenizer(
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new BufferedReader(new InputStreamReader(System.in)));
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try { // case TT_EOL occurs only if execute st.eolIsSignificant(true);
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while (st.nextToken() != st.TT_EOF) {
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switch(st.ttype) {
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case st.TT_NUMBER:
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System.out.println("double number=" + st.nval);
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break;
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case st.TT_WORD:
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System.out.println("word=" + st.sval);
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break;
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case st.TT_EOL:
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System.out.println("end of line");
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break;
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default:
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System.out.println("unrecognized character");
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break;
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}
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}
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System.out.println("end of file");
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} catch (IOException e) {
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System.err.println("Tokenize: " + e);
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}
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}
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}
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/* ............... Example compile and run(s)
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% javac tokn.java
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% java Tokenize
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Enter some numbers and words.
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1 2 3
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double number=1.0
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double number=2.0
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double number=3.0
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4.0 5.5 6.667
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double number=4.0
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double number=5.5
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double number=6.667
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1 abc def,ghi (jkl) !@#
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double number=1.0
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word=abc
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word=def
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unrecognized character
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word=ghi
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unrecognized character
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word=jkl
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unrecognized character
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unrecognized character
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unrecognized character
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unrecognized character
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^D
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end of file
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... end of example run(s) */
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