单项选择题
Given: What is the result?()
A.2 B.3 C.12 D.23
Click the Exhibit button. Which code, inserted at line 14, will allow this class to correctly serialize and deserialize?()
A.s.defaultReadObject(); B.this = s.defaultReadObject(); C.y = s.readInt(); x = s.readInt(); D.x = s.readInt(); y = s.readInt();
Given: 22.StringBuilder sb1 = new StringBuilder("123"); 23.String s1 = "123"; 24.// insert code here 25.System.out.println(sb1 + " " + s1); Which code fragment, inserted at line 24, outputs "123abc 123abc"?()
A.sb1.append("abc"); s1.append("abc"); B.sb1.append("abc"); s1.concat("abc"); C.sb1.concat("abc"); s1.append("abc"); D.sb1.concat("abc"); s1.concat("abc"); E.sb1.append("abc"); s1 = s1.concat("abc");
Given: Which method will complete this class?()
A.public int compareTo(Object o){/*more code here*/} B.public int compareTo(Score other){/*more code here*/} C.public int compare(Score s1,Score s2){/*more code here*/} D.public int compare(Object o1,Object o2){/*more code here*/}
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