单项选择题
public class ItemTest {
private final mt id;
public ItemTest(int id) { this.id = id; }
public void updateId(int newId) { id = newId; }
public static void main(String[] args) {
ItemTest fa = new ItemTest(42);
fa.updateId(69);
System.out.println(fa.id);
}
}
What is the result?()
A. Compilation fails.
B. An exception is thrown at runtime.
C. The attribute id in the Item object remains unchanged.
D. The attribute id in the Item object is modified to the new value.
E. A new Item object is created with the preferred value in the id attribute.
相关考题
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单项选择题
public class Item { private String desc; public String getDescription() { return desc; } public void setDescription(String d) { desc = d; } public static void modifyDesc(Item item, String desc) { item = new Item(); item.setDescription(desc); } public static void main(String[] args) { Item it = new Item(); it.setDescription(”Gobstopper”); Item it2 = new Item(); it2.setDescription(”Fizzylifting”); modifyDesc(it, “Scrumdiddlyumptious”); System.out.println(it.getDescription()); System.out.println(it2.getDescription()); } } What is the outcome of the code? ()
A. Compilation fails.
B. Gobstopper Fizzylifting
C. Gobstopper Scrumdiddlyumptious
D. Scrumdiddlyumptious Fizzylifltng
E. Scrumdiddlyumptious Scrumdiddlyumptious -
单项选择题
11. class Payload { 12. private int weight; 13. public Payload(int wt) { weight = wt; } 13. public void setWeight(mt w) { weight = w; } 15. public String toString { return Integer.toString(weight); } 16. } 17. 18. public class TestPayload { 19. static void changePayload(Payload p) { 20. /* insert code here */ 21. } 22. 23. public static void main(String[] args) { 24. Payload p = new Payload(); 25. p.setWeight(1024); 26. changePayload(p); 27. System.out.println(”The value of p is “+ p); 28. } 29. } Which statement, placed at line 20, causes the code to print “The value of p is 420.”?()
A. p.setWeight(420);
B. p.changePayload(420);
C. p = new Payload(420);
D. Payload.setWeight(420);
E. p = Payload.setWeight(420);
F. p = new Payload(); p.setWeight(420); -
多项选择题
11.publicclassCommander{ 12.publicstaticvoidmain(String[]args){ 13.StringmyProp=/*insertcodehere*/ 14.System.out.println(myProp); 15.} 16.} andthecommandline: java-Dprop.custom=gobstopperCommander Whichtwo,placedonline13,willproducetheoutputgobstopper?()
A. System.load(”prop.custom”);
B. System.getenv(”prop.custom”);
C. System.property(”prop.custom”);
D. System.getProperty(”prop.custom”);
E. System.getProperties().getProperty(”prop.custom”);
