java - 选择并返回多个数组元素？等等 arrayName.get(1 到 3)

Question

我正在尝试格式化一个字符串，每个单词之间的空格数需要根据每个字符串进行更改。我已经完成了计算所需空格数量的代码。我创建了一个包含多个“”元素的数组，我用这些元素来更改每个单词之间的空格数。如何打印数组中的 X 到 Y 元素？

blankarrayList.get(1-2) // just prints the item in position -1
blankarrayList.get(1,2) // just prints items one and two, this works but 
                        // doesnt allow me to easily change the number printed (that i know of)


public static String format(List<String> myWords) {
    System.out.println(myWords.get(0) + blankarrayList.get(/*array positions 1 through 3*/) 
                     + myWords.get(1) + blankarrayList.get(/*array positions 1 through 3*/)
                     + myWords.get(2) + blankarrayList.get(/*array positions 1 through 3*/)
                     + my words.get(3));

    return myWords.get(0);
}   

Answer 1

blankarrayList.get(/*array positions 1 through 3*/)

blankarrayList.subList(1, 3); // This gives a sub-list which specified index

因此，您可以将新子列表中的所有元素组合起来，如下所示

System.out.println(myWords.get(0) + StringUtils.join(blankarrayList.subList(1, 3), "") 
                 + myWords.get(1) + StringUtils.join(blankarrayList.subList(1, 3), "")
                 + myWords.get(2) + StringUtils.join(blankarrayList.subList(1, 3), "")
                 + my words.get(3));

您也可以编写如下所示的所有内容:

System.out.println(StringUtils.join(myWords, blankarrayList.subList(1, 3)));