Java集合操作：合并、包含判断和元素删除

import java.util.ArrayList; import java.util.Arrays; import java.util.List;

public class Test { public static void main(String[] args) { List c1 = new ArrayList<>(Arrays.asList('one', 'two', 'three')); List c2 = new ArrayList<>(Arrays.asList('four', 'five', 'six')); c1.addAll(c2); List c3 = new ArrayList<>(Arrays.asList('one', 'five')); boolean containsAll = c1.containsAll(c3); System.out.println('c1是否包含所有c3的元素：' + containsAll); c1.remove('two'); System.out.println('删除two后的c1集合：' + c1); } }