吴江清华电商app制作:谁介绍一下java类库里StreamTokenizer class 的用法吧?
来源:百度文库 编辑:高校问答 时间:2024/05/10 07:49:28
谢谢
try {
// Create a tokenizer to read java file
FileReader rd = new FileReader("filename.java");
StreamTokenizer st = new StreamTokenizer(rd);
st.parseNumbers();
st.wordChars('_', '_');
st.eolIsSignificant(true);
// If whitespace is not to be discarded, make this call
st.ordinaryChars(0, ' ');
// These calls caused comments to be discarded
st.slashSlashComments(true);
st.slashStarComments(true);
// Parse the file
int token = st.nextToken();
while (token != StreamTokenizer.TT_EOF) {
token = st.nextToken();
switch (token) {
case StreamTokenizer.TT_NUMBER:
// A number was found; the value is in nval
double num = st.nval;
break;
case StreamTokenizer.TT_WORD:
// A word was found; the value is in sval
String word = st.sval;
break;
case '"':
// A double-quoted string was found; sval contains the contents
String dquoteVal = st.sval;
break;
case '\'':
// A single-quoted string was found; sval contains the contents
String squoteVal = st.sval;
break;
case StreamTokenizer.TT_EOL:
// End of line character found
break;
case StreamTokenizer.TT_EOF:
// End of file has been reached
break;
default:
// A regular character was found; the value is the token itself
char ch = (char)st.ttype;
break;
}
}
rd.close();
} catch (IOException e) {
}