A: 2.5
B: 2
C: 输出内容不确定
D: 程序错误，无法运行
举一反三
- public class test1 { public static int add(int a, int b) { return a+b; } public static double add(double a, double b) { return a+b; } ________________ ___________________ { ________________ ___________________ } public static void main(String[] args) { System.out.println("调用add方法:"+add(2.1,3.4,4.5)); } }
- class Demo{ public static void main(String[] args){ int x = 0; try{ x = div(1,2); }catch(Exception e){ System.out.println(e); } System.out.println(x) ; } public static int div(int a,int b){ return a / b ; } }
- 中国大学MOOC: public class Test{ public static void main(String[ ] args) { int result =???; System.out.println(result); } public static int operate(double a, int b) { return 10*(int)(a+b); } public static int operate(int a, double b) { return 100*(int)(a+b); } public static int operate(double a, double b) { return 1000*(int)(a+b); }}???处填入（ ）时，编译程序会出错。
- 写出程序的运行结果。 public class Demo{ public static void main(String args[]) { int b = get(); System.out.println(b); } public static int get() { try { return 1; } finally { return 2; } } }
- 下面程序的运行结果( )public class Demo{public static int fun(int c){return c+=2;}public static void main(String[] args){int temp=fun(2);System.out.println(temp);}} A: 2 B: 4 C: 6 D: 8
内容
- 0
下面程序运行结果为___________________。public class MyClass{ private static int a = 19; public static void modify(int a){ a = a + 5;} public static void main(String[] args){ modify(a); System.out.println(a); }}
- 1
以下程序的运行结果是______ class A{public int getNumber(int a){return a+1;}}class B extends A{public int getNumber(int a, char c){return a+2;} public static void main(String[] args) {B b=new B();System.out.println(b.getNumber(0));} }
- 2
请阅读下面的程序 public class Demo { public static void sum(int a, int b) { System.out.println("int:" + (a + b)); } public static void sum(int a, float b) { System.out.println("float:" + (a + b)); } public static void sum(int a, double b) { System.out.println("double:" + (a + b)); } public static void main(String[] args) { int a = 10; long b = 20; sum(a, b); } } 下列选项中,哪一个是程序的运行结果()
- 3
以下程序运行结果是 public class Test { public static void main(String[] args) { int a=1，b[]={2}; add(a); add(b); System.out.println(a+","+b[0]); } static int add(int x){ x++; return x; } static void add(int[] x){ x[0]++; } }
- 4
下列代码能否正常运行，如果能够正常运行，输出结果是什么？ public class TestClass { public static void main(String[] args) { int num1=5; int num2=5; class InnerClass{ public int add(){ return num1+num2; } }; InnerClass in=new InnerClass(); System.out.println(in.add()); } }