?Crouse[] crouse={new Crouse("2","語文"),new Crouse("3","數學")};

? coursestoselect.addAll(Arrays.asList(crouse));

? Crouse temp2=(Crouse)coursestoselect.get(2);

? Crouse temp3=(Crouse)coursestoselect.get(3);

? System.out.print("添加了課程："+temp2.id+":"+temp2.name+"\n"+"添加了課程："+temp3.id+":"+temp3.name+"\n");

??

??

? Crouse[] crouse2={new Crouse("4","大文"),new Crouse("5","大學")};

? coursestoselect.addAll(Arrays.asList(2,crouse2));

? Crouse temp4=(Crouse)coursestoselect.get(2);

? Crouse temp5=(Crouse)coursestoselect.get(3);

? System.out.print("添加了課程："+temp4.id+":"+temp4.name+"\n"+"添加了課程："+temp5.id+":"+temp5.name+"\n");

? ?}
2次輸出的結果是一樣的，第二個數組里面的根本就沒有插入到列表啊？