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LIst 相关待整理的知识点
2022-07-04 22:37:00 【张紫娃】
Arrays.asList()和new ArrayList()区别:
Arrays.asList()和new ArrayList()返回的List的都继承了AbstractList
但new ArrayList<>对某些方法做了重写、支持 add(),remove()操作
而Arrays.asList(st1)只做了继承,没有重写、不支持 add(),remove()操作,只支持遍历读操作;
List.of()和Arrays.asList()区别
https://blog.csdn.net/qq_42520962/article/details/109380430
1、Arrays.asList()可以包含/contains null,而List.of()不可以包含/contains null (NullPointerException)
2、List.of生成的List不能修改,Arrays.asList生成的List能修改;如ls1.set(0,5);
3、关于数组修改对List的影响。数组修改对Arrays.asList生成的List有影响,对List.of 生成的List无影响:
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