System.out.println("\n例子2 - 计算所有对象出现的次数");
Set uniqueSet = new HashSet(list);
for (String temp : uniqueSet) {
System.out.println(temp + ": " + Collections.frequency(list, temp));
}
System.out.println("\n例子2 - 计算所有对象出现的次数");
Set uniqueSet = new HashSet(list);
for (String temp : uniqueSet) {
System.out.println(temp + ": " + Collections.frequency(list, temp));
}