1. public class Boxer1 { 2. Integer i; 3. int x; 4. public Boxer1(int y) { 5. x=i+y; 6. System.out.println(x); 7. } 8. public static void main(String[] args) { 9. new Boxer1(new Integer(4)); 10. } 11. } What is the result?()
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1.public class Test { 2.public static void main (String args[]) { 3.class Foo { 4.public int i = 3; 5.} 6.Object o = (Object) new Foo(); 7.Foo foo = (Foo)o; 8.System.out.printIn(foo. i); 9. } 10.} What is the result?()
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1. public class A { 2. void A() { 3. System.out.println(“Class A”); 4. } 5. public static void main(String[] args) { 6. new A(); 7. } 8. } What is the result?()
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public class TestString 1 { public static void main(String[] args) { String str = “420”; str += 42; System.out.print(str); } } What is the output?()
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public class test { public static void main(String [] a) { assert a.length == 1; } } Which two will produce an AssertionError?()
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class Top { static int x = 1; public Top(int y) { x *= 3; } } class Middle extends Top { public Middle() { x += 1; } public static void main(String [] args) { Middle m = new Middle(); System.out.println(x); } } 结果为:()
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Given: 1. public class ConstOver { 2. public constOver(int x, int y, int z) { 3. } 4. } Which two overload the ConstOver Constructor?()
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现有2 个文件: 1. package x; 2. public class X { 3. public static void doX() { System.out.print("doX "); } 4. } 和: 1. class Find { 2. public static void main(String [] args) { 3. //insert code here 4. } 5. } 哪两行分别插入到类Find 的第3 行将编译并产生输出“doX”? ()
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1. class SuperClass { 2. public a geta() { 3. return new a(); 4. } 5. } 6. class SubClass extends SuperClass { 7. public b geta() { 8. return new b(); 9. } 10. } Which is true?()
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1. public class A { 2. public void doit() { 3. } 4. public String doit() { 5. return “a”; 6. } 7. public double doit(int x) { 8. return 1.0; 9. } 10.} What is the result?()
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1. class Super { 2. public float getNum() { return 3.0f; } 3. } 4. 5. public class Sub extends Super { 6. 7. } Which method, placed at line6, causes compilation to fail?()
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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]); } }
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class A { public byte getNumber() { return 1; } } class B extends A { public short getNumber() { return 2; } public static void main(String args[]) { B b = new B(); System.out.println(b.getNumber()); } } What is the result?()
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1.public class Test1{ 2. public float aMethod(float a,float b){ } 3. 4,} 将以下哪种方法差如行 3 是不合法的( )
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智慧职教: 程序的执行结果是() public class Test { public static void main(String [] args){ System.out.println(“”+'a'+1); } }
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分析如下所示的Java代码,则选项中的说法正确的是( )。 class Parent{ public String name; public Parent(String pName){ this.name = pName; } } public class Test extends Parent { //1 public Test(String Name){ //2 name=\hello
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给出下面的程序代码:public class X4_1_3 { private float a; public static void m ()访问
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有如下程序:include<iostream>using namespace std;class GA{public:virtual int f(){return 1
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关于下面的程序Test.java说法正确的是()。public class Test {String x="1";int y;
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1、读下面的程序,写出输出结果include <iostream> using namespace std; class A { public: A(int i) {cout<<"constructing A "<<i<<endl;} }; class B { public: B(int j) {cout<<"constructing B "<<j<<endl;} }; class C: public A, public B { public: C(int a, int b, int c, int d): A(a), mB(d), mA(c),B(b) { } private: B mB; A mA; }; int main() { C obj(1,2,3,4); return 0; }
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3、阅读下面代码,写出输出结果: public class A { public void fun1(int n) { Console.WriteLine("{0}x2={1}", n, 2 * n); } public void fun2(int n) { Console.WriteLine("{0}x3={1}", n, 3 * n); } } public delegate void mydelegate(int n) public class Test { public static event mydelegate p; static void Main() { A a = new A(); p += new mydelegate(a.fun1); p(1); } }
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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
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Given a class Repetition:1.package utils;2.3.public class Repetition{4.public static String twice(Strings){returns+s;}5.}and given another class Demo:1.//insert code here2.3.public class Demo{4.public static void main(String[]args){5.System.out.println(twice("pizza"));6.}7.}Which code should be inserted at line 1 of Demo.java to compile and run Demo to printpizzapizza”?()
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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】 } }
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33、试图编译和运行以下代码的结果是: class Base { private Base() { System.out.println(0); } public Base(int i) { System.out.println(i); } } public class Test extends Base { public Test() { super(1); }; public static void main(String argv[]){ Test t = new Test(); } }
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