Set 集合的简单使用

Set 集合的简单使用

insertSet 方法：

public Set<String> insertSet(Set<String> stringSet) {
        for (int i = 0; i < 10; i++) {
            stringSet.add(i + "");
        }
        return stringSet;
    }
​

deleteSet 方法：

 public Set<String> deleteSet(Set<String> stringSet, String string) {
        stringSet.remove(string);
        return stringSet;
    }
​

updateSet 方法：

 public Set<String> updateSet(Set<String> stringSet, String deleteString, String updateString) {
        stringSet.remove(deleteString);
        stringSet.add(updateString);
        return stringSet;
    }
​

selectForEachSet 方法：

public void selectForEachSet(Set<String> stringSet) {
        for (String s : stringSet) {
            System.out.print(s + "\t");
        }
    }
​

selectIteratorSet 方法：

public void selectIteratorSet(Set<String> stringSet) {
        Iterator<String> iterator = stringSet.iterator();
        while (iterator.hasNext()) {
            String string = iterator.next();
            System.out.print(string + "\t");
        }
    }
​

Main 方法：

public static void main(String[] args) {
        Set<String> stringSet = new HashSet<>();
        SetTest setTest = new SetTest();
        stringSet = setTest.insertSet(stringSet);
        System.out.println("--------------");
        setTest.selectForEachSet(stringSet);
        System.out.println("--------------");
        setTest.deleteSet(stringSet, "1");
        setTest.selectIteratorSet(stringSet);
        System.out.println("--------------");
        setTest.updateSet(stringSet, "5", "15");
        setTest.selectIteratorSet(stringSet);
    }
​