创建List集合

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List<String> stringList = new ArrayList<>();
stringList.add("1");
stringList.add("2");
stringList.add("3");
stringList.add("4");

遍历

for循环

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for (int i = 0; i < stringList.size(); i++) {
    System.out.print(stringList.get(i)+" ");
}

foreach循环

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for (String s : stringList) {
    System.out.print(s+" ");
}

迭代器

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Iterator iterator = stringList.iterator();
while (iterator.hasNext()) {
	System.out.print(iterator.next() + " ");
}