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package java.util;
import java.util.Enumeration;
import java.util.NoSuchElementException;
public class StringTokenizer
implements Enumeration
{
private String s;
private String delims;
private boolean retDelims;
private int maxPos;
private int pos;
public StringTokenizer(String s, String delims)
{
this(s, delims, false);
}
public StringTokenizer(String s, String delims, boolean retDelims)
{
this.s = s;
this.delims = delims;
this.retDelims = retDelims;
this.maxPos = s.length();
}
public boolean hasMoreTokens()
{
if (retDelims)
{
return pos < maxPos;
}
else
{
int next = pos;
while (next < maxPos && isDelim(next))
{
next++;
}
return next < maxPos;
}
}
public String nextToken()
{
String tok;
if (pos == maxPos)
{
throw new NoSuchElementException("no more tokens");
}
if (retDelims)
{
if (isDelim(pos))
{
tok = s.substring(pos, pos + 1);
pos++;
return tok;
}
}
while (pos < maxPos && isDelim(pos))
{
pos++;
}
int start = pos;
while (pos < maxPos && !isDelim(pos))
{
pos++;
}
if (pos < maxPos)
{
tok = s.substring(start, pos);
}
else
{
tok = s.substring(start);
}
return tok;
}
public boolean hasMoreElements()
{
return hasMoreTokens();
}
public Object nextElement()
{
return nextToken();
}
private boolean isDelim(int index)
{
char c = s.charAt(index);
for (int i = 0; i != delims.length(); i++)
{
if (delims.charAt(i) == c)
{
return true;
}
}
return false;
}
}
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