[英]How to create an String ArrayList in Java with a repeating pattern
如何使用重復的字符串組創建一個String ArrayList
"A", "B", "C", "A", "B", "C", "A", "B", "C", "A", "B", "C", ......
在Python中我使用
list = deque(["A","B","C"]*288) # 288 times "A","B","C"
您可以使用IntStream
創建288個項目的范圍,然后將其平面映射到三個字符串:
List<String> strings = IntStream.range(0, 288)
.boxed()
.flatMap(i -> Stream.of("A", "B", "C"))
.collect(Collectors.toList());
沒有復雜的事情,使用一個簡單的for循環:
ArrayList<String> alphabets = new ArrayList<String>();
for (int i=0; i<288; i++) {
alphabets.add("A");
alphabets.add("B");
alphabets.add("C");
}
嘗試這個
for (int i = 0; i < 288; i++) {
arrayListName.add((3 * i), "A");
arrayListName.add((3 * i + 1), "B");
arrayListName.add((3 * i + 2), "C");
}
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