读代码:1. public interface Foo{2.int k = 4;3. }Which three are equivalent to line 2? (Choose Three)
相似题目
-
Given:10. interface Data { public void load(); }11. abstract class Info { public abstract void load(); }Which class correctly uses the Data interface and Info class?()()
-
public interface A { String DEFAULT_GREETING = “Hello World”; public void method1(); } A programmer wants to create an interface called B that has A as its parent. Which interface declaration is correct?()
-
1. interface TestA { String toString(); } 2. public class Test { 3. public static void main(String[] args) { 4. System.out.println(new TestA() { 5. public String toString() { return “test”; } 6. } 7. } 8. } What is the result?()
-
现有: public interface A {} 以下哪项声明是合法的?()
-
Given: 10.interface Data { public void load(); } 11.abstract class Info { public abstract void load(); } Which class correctly uses the Data interface and Info class?()
-
interface Data { public void load(); } abstract class Info { public abstract void load(); } Which class correctly uses the Data interface and Info class?()
-
现有: public interface A {} 以下哪项声明是合法的?()
-
Given: 1. public interface Foo { 2. int k = 4: 3. } Which three are equivalent to line 2?()
-
interface A { public int getValue() } class B implements A { public int getValue() { return 1; } } class C extends B { // insert code here } Which three code fragments, inserted individually at line 15, make use of polymorphism?()
-
执行以下代码,输出结果的结果是? () public class Test{ public String[] ss = new String[5]; public static void main(String[] args){ System.out.println(ss[1]); } }
-
读代码:public class Test {public static void main (String args[]) {class Foo {public int i = 3;}Object o = (Object) new Foo();Foo foo = (Foo)o;System.out.println(foo.i);}}结果是:
-
设有如下代码public class Test6{int attr[] = {1,2,3};public static void main ( String args[] ) {System.out.println(attr[0]);}}哪个叙述为真?
-
读代码:public class foo {static String s;public static void main (String[]args) {System.out.println (“s=” + s);}}结果是:
-
读代码:public class ExceptionTest {class TestException extends Exception {}public void runTest () throws TestException {}public void test () /* Point X*/ {runTest ();}}第4行//point X 位置, 加哪行代码能让代码可编译
-
读代码:public class Test {public static void main (String [] args) {String foo = “blue”;String bar = foo;foo = “green”;System.out.println(bar);}}结果是:
-
执行下面代码,下面描述正确的是( ) public class Person{ static int arr[]=new int[10]; public static void main(String a[]){ System.out.println(arr[1]); } }
-
给出下面的程序代码:public class X4_1_3 { private float a; public static void m ()访问
-
请依次说出【代码1】-【代码2】的输出结果。注意:结果之间用英文的分号分隔 interface A{ double f(double x, double y); } class B implements A{ public double f(double x, double y){ return x*y; } int g(int a, int b){ return a+b; } } public class E{ public static void main(String args[]){ A a=new B(); System.out.println(a.f(3,5)); // 【代码1】 B b=(B)a; System.out.println(b.g(3,5)); // 【代码2】 } }
-
给出下面代码: public class Person{ static int arr[] = new int[10];public static void main(String a[]) {System.out.println(arr[1]); } }()是正确的。
-
public class InterfaceDemo implements A,B{ @Override public void f(){ // TODO Auto-generated method stub }}interface A{ void f()throws IOException;}interface B{ void f()throws ClassNotFoundException;}
-
31、实现interface的方法前一定要用public修饰
-
下列代码中,将引起一个编译错误的行是 1) public class Test 2) int m,n; 3) public Test() 4) public Test(int
-
以下代码运行后输出的内容()interface AAA{ void fun(); } class BBB extends AAA{ public void fun() { System.out.println("fun"); } } public class Main { public static void main(String[] args) { AAA a = new BBB(); a.fun(); } }
-
对于下列代码,下列哪个叙述是正确的()? class A{ public int i=0; A(int m){ i=1; } } public class B extends A{ B(int m){ i=2; } public static void main(String args[]){ B b=new B(100); System.out.println(b.i); //【代码】 } }