1. class Calc { 2. public static void main(String [] args) { 3. try { 4. int x = Integer.parseInt("42a"); 5. //insert code here 6. System.out.print("oops "); 7. } 8. } 9. } 下面哪两行分别插入到第五行,会导致输出“oops”?()
有函数原型void fun8(int&);在下列选项中,正确的调用是()
在public void onCreate(SQLite Database db)方法中执行SQL语句的方法是?()
Given: 11. public void genNumbers() { 12. ArrayList numbers = new ArrayList(); 13. for (int i=0; i<10; i++) { 14. int value = i * ((int) Math.random()); 15. Integer intObj = new Integer(value); 16. numbers.add(intObj); 17. } 18. System.out.println(numbers); 19. } Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection?()
Which two are void examples of method overriding? ()
abstract class A { abstract void al(); void a2() { } } class B extends A { void a1() { } void a2() { } } class C extends B { void c1() { } } and: A x = new B(); C y = new C(); A z = new C(); Which four are valid examples of polymorphic method calls?()
class Thread2 implements Runnable { void run() { System.out.print("go "); } public static void main(String [] args) { Thread2 t2 = new Thread2(); Thread t = new Thread(t2); t.start(); } } 结果为:()
class Flibitz{ public static void main(String[] args){ int grop=7; new Flibitz().go(grop); System.out.print(grop); } void go(int grop){ if(++grop>7) grop++; System.out.print(grop); } } 结果为:()
public class X { public static void main (String args) { byte b = 127; byte c = 126; byte d = b + c; } } Which statement is true?()
class TestApp{ public static void main (String[ ] args){ for(int i=0;i<10;i++){ if(i==3) break; System.out.print (i); } } } 程序运行后的输出是哪项?()