List<String>复制

List转Array
　　List<String> bb = new ArrayList<>();
　　Array[] dd = bb.toArray(new String[0])；

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Array复制为List<String>
　　String[] aa = new String[]{"1","2","3"};
　　List<String> destList = new ArrayList(Arrays.asList(aa));
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List<String>间复制

　　ArrayList<String> list = new ArrayList<>();
　　List<String> originList = new ArrayList<>();
　　originList.add("1");
　　originList.add("2");
　　list = new ArrayList<>(originList);  ====>其内部源码为 Arrays.copyOf(aa,aa.length,String[].class);

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String数组间复制：
　　String[] aa = new String[]{"1","2","3"};
　　String[] bb = Arrays.copyOf(aa,aa.length,String[].class);