现有: class TestApp{ public static void main (String[] args){ for (int i=0; iif(i==3) break; System. out .print (i); } } } 程序运行后的输出是哪项?()
public class TestApp{ public static void main(String[] args){ try{ String myname = null; if(myname.length()>2) System.out.print(“1”); }catch(NullPointerException e){ System.out.print(“2”); } } } 上述程序运行后的输出是哪项?()
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?()
程序: 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?()
class TestApp{ public static void main(String[] args){ System.out.println(multiply(2,3,4,5)); } public int multiply(int... nums){ int result=1; for(int x:nums) result*=x; return result; } } 程序运行后的输出是哪项?()
现有: interface Data {public void load();} abstract class Info {public abstract void load();} 下列类定义中正确使用Data和Info的是哪项?()
现有: class TestApp{ public static void main (String[] args){ for (int i=0; iif(i==3) break; System. out .print (i); } } } 程序运行后的输出是哪项?()
现有: public class TestDemo{ private int X-2; static int y=3; public void method(){ final int i=100; int j =10; class Cinner { public void mymethod(){ //Here } } } } 在Here处可以访问的变量是哪些?()
现有: public class Pet() public class Cat extends Pet{) 执行代码 Cat c- new Cat(); Pet p= (Pet)c; 后下列哪项是正确的?()
现有: class WhileTests { public static void main (String [] args) { int X=5; while (++x<4) { --x; } System.out.println( "x="+x); } } 结果是什么?()
程序: class TestApp{ public static void main(String[] args){ System.out.println(multiply(2,3,4,5)); } public int multiply(int[] nums){ int result = 1; for(int x :nums) result *= x; return result; } } 程序运行后的输出是哪项?()
现有: class Output { public static void main (String[] args) { int i=5: System.out.print( "4"+i+""); System.out.print (i+5+"7"); System.out.println (i+"8"); } } 结果为:()
现有: class A {public String name="a"} class B extends A {public String name="b"} 执行如下代码后的结果是哪项?() A a=new B(); System.out.println(a.name);
程序: class TestApp{ public static void main(String[] args){ for(int i=0;i<5;i++) System.out.print(i+1); System.out.println(i); } } 上述程序运行后的结果是哪项?()
程序: class TestApp{ public static void main() String[] args){ for(int i=0;i<10;i++){ if(i==3) break; 当循环到3时,自动跳出 System.out.print(i); } } } 程序运行后的输出是哪项?()
现有: public class Pet() public class Cat extends Pet{) 执行代码 Cat c- new Cat(); Pet p= (Pet)c; 后下列哪项是正确的?()
现有 public class Demo{ public static void main (String[] args){ List al=new ArrayList(); a1.add("l"); a1.add("2"); a1.add("2"); a1.add("3"); System.out.println (al); } } 上述程序执行后的输出是哪项?()
现有 public class Parentt public void change (int x){) ) public class Child extends Parent{ //覆盖父类change方法 } 下列哪个声明是正确的覆盖了父类的change方法?()
现有: class TestApp{ public static void main (String[] args){ int [5] myarray={ 10, 11, 12, 13, 14); int sum=0; for (int x : myarray) sum+=x; System. out. println( "sum= "+sum); } } 上述程序运行后的结果是哪项?()
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”? ()
现有2个文件: package x; public class X{ public static void doX() {System.out.print("doX");} } 和: class Find{ public static void main(String [] args) { //insert code here } } 哪两行分别插入到类Find的第3行将编译并产生输出“doX”?()
public class TestApp{ public int mymethod(){ try{ int i = 0; int j = 1 / i; System.out.println(“1”); }finally{ System.out.print(“4”); } return 1; } } 上述程序运行后的输出是哪项?()
public class TestApp{ public int mymethod(){ try{ int i = 0; int j = 1 / i; System.out.println(“1”); }finally{ System.out.print(“4”); } return 1; } } 上述程序运行后的输出是哪项?()
现有:class TestApp{public static void main (String[] args){for (int i=0; i<lo;i++){if(i==3)break;System. out .print (i);}}}程序运行后的输出是哪项()</lo;i++){