//泛型，为什么用iterator迭代器，需要进行强转？
public void testItrater(){ Iterator it = course.iterator(); while(it.hasNext()){ Course cr = (Course) it.next(); System.out.println(cr.id+" "+cr.name); } }
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public void testItrater(){ Iterator it = course.iterator(); while(it.hasNext()){ Course cr = (Course) it.next(); System.out.println(cr.id+" "+cr.name); } }
2018-10-21
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