java之把一個String數組中有相同共性的元素抽取出來組成新的數組

原始數組：  String [] data = {"101//aaa","102//bbb","101//ccc","103//aaa","102//vvvv"};html 把相同開頭的，例如101,102,103開頭的元素，取出來組成新的數組java String[] a1={"101//aaa","101//ccc"}; String[] a2={"102//bbb","102//vvvv"

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