A.JList B.JProgressBar C.JComboBox D.JButton
1. import java.util.*; 2. class ForInTest { 3. static List list = new ArrayList(); 4. 5. static List getList() { return list; } 6. 7. public static void main(String [] args) { 8. list.add("a"); list.add("b"); list.add("c"); 9. // insert code here 10. System.out.print(o); 11. } 12. } 第 9 行插入哪一項(xiàng)將輸出 abc?()
A.for(char o: list) B.for(Object o: getList()) C.for(Object o: getList();) D.for(Object o: o.getList())
class Number { public static void main(String [] args) { try { System.out.print(Integer.parseInt("forty ")); } catch (RuntimeException r) { System.out.print("runtime "); } catch (NumberFormatException e) { System.out.print("number "); } } } 結(jié)果是什么?()
A.forty B.number C.runtime D.編譯失敗