public class SimpleQuestion {
static boolean yesOrNo(String s) {
s = s.toLowerCase();
if (s.equals("yes") || s.equals("y") || s.equals("t")) {
s = "true";
}
return Boolean.getBoolean(s);
}
public static void main(String[] args) {
System.out.println(yesOrNo("true") + " " + yesOrNo("Yes"));
}
}
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
public class InstrumentedHashSet<E> extends HashSet<E> {
private int addCount = 0;
@Override
public boolean add(E e){
addCount++;
return super.add(e);
}
@Override
public boolean addAll(Collection<? extends E> c){
addCount += c.size();
return super.addAll(c);
}
public static void main(String[] args) {
InstrumentedHashSet<String> s = new InstrumentedHashSet<String>();
s.addAll(Arrays.asList("Accordion","Banjo","Kazoo"));
System.out.println(s.addCount);
}
}
问题:打印结果是什么?
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class Searching {
public static void main(String[] args) {
String[] strings = { "0", "1", "2", "3", "4", "5"};
List<Integer> integers = new ArrayList<Integer>();
for(String s : strings){
integers.add(Integer.valueOf(s));
}
System.out.println(Collections.binarySearch(integers, 1,cmp));
}
static Comparator<Integer> cmp = new Comparator<Integer>(){
public int compare(Integer i,Integer j){
return i<j?-1:(i==j?0:1);
}
};
}
问题:打印结果是什么?
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