?? vectoriterator.java
字號:
/**
* A vector iterator to print data reverse
*/
import java.io.*;
import java.util.*;
public class VectorIterator implements Iterator {
private Vector data = new Vector();
private int cursor = 0;
public VectorIterator(Vector _data) {
data = _data;
}
public void First() {
//cursor = 0;
cursor = (data.size() - 1);
}
public void Next() {
//cursor++;
cursor--;
}
public boolean IsDone() {
//return (cursor >= data.size());
return (cursor < 0);
}
public void CurrentItem() {
if(IsDone()) {
System.out.println("Reach the end of the vector");
} else {
System.out.println("Number " + cursor + ": " + data.get(cursor));
}
}
}
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