举一反三
- 以下程序的运行结果是：() public class Increment{ public static void main(String args[]) { int a; a = 6; System.out.print(a); System.out.print(a++); System.out.print(a); } }
- 以下代码执行后的结果是: public class Person { String name = “小芳”; public Person(String name) { name = “小兰”; } public void show() { this.name = “小翠”; } public static void main(String[] args) { Person p = new Person(“小凤”); System.out.print(p.name); p.show(); System.out.print(p.name); } }
- 下面的程序中，哪行会报错？ publicclassStaticTest{ intage; Stringname; staticinttotalFee=500; publicvoidshowName(){ System.out.print(this.name); } publicstaticvoidshowTotalFee(){ line1：System.out.print(totalFee); line2：showName(); } publicstaticvoidmain(String[]args){ line3：StaticTest.showTotalFee(); } }
- 以下哪个是有效的Java程序入口函数？ A: public static void main(String[] args); B: public static void main(); C: public static int main(String[] args); D: public static void main(int argc, String[] args)
- public class test { public static void main(String args[]) { int m=0; for ( int k=0;k<2;k++) method(m++); System.out.println(m); } public static void method(int m) { System.out.print(m); } }
内容
- 0
以下哪个main()方法的声明能够作为程序的入口方法？ A: public static void main(） B: public static void main(String[] string) C: public static void main(String args) D: static public int main(String[] args) E: static void main(String[] args)
- 1
分析下面的程序，输出的结果是？ public class Test { public static void main(String[] args) { final Person p = new Person("张三", 23); p.setName("李四"); p.setAge(24); System.out.println(p); } } class Person { private String name; private int age; public Person() { super(); } public Person(String name, int age) { super(); this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "我的姓名是:" + name + ",我的年龄是:" + age ; } }
- 2
请阅读下面的程序 class Test { private static String name; static { name = "World"; System.out.print (name); } public static void main(String[] args) { System.out.print("Hello"); Test test = new Test(); } } 下列选项中,程序运行结果是
- 3
（1+X）以下哪个不是 “public static void aMethod(){...}” 的重载方法（ ）？ A: public static void aMethod(int num ) ; B: public static int aMethod() ; C: public static void aMethod(int num ,String name) ; D: public static void aMethod(String name) ;
- 4
下列程序的运行结果是（）。 public class Test public static void main ( String [ ] args ) int count = 0 for( int i = 1 i < 5 i = 2) for( int j = 1 j< = 10 j = 3) count System .out .print (count ) _