What package do we need to include to use the array list in the program?a)java.utilb)java.arraylistsc)None of the mentionedd)java.lang
Question
What package do we need to include to use the array list in the program?a)java.utilb)java.arraylistsc)None of the mentionedd)java.lang
Solution
The correct answer is a) java.util. This package in Java contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array). The ArrayList class which is widely used in Java programming is part of this package.
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关于数组或ArrayList的长度,以下哪个陈述是不正确的?对于ArrayList,可以通过一个ArrayList方法的返回值来获得对于Java数组,可以通过一个Java数组方法的返回值来获得对于Java数组和ArrayList,数组的最高索引等于数组中的元素数量减去1ArrayList的长度在声明后可以被更改Java数组的长度在声明后无法更改如果您认为上述所有陈述都是正确的,请选择此选项。
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Introduction to ArrayLists and their advantages
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