下面（ ）方法是public void example(){}的重载方法。 A: private String example(){} B: public int example(String str){} C: public void example2(){} D: public int example(int m,float f){}

public class Example { String str = new String("Java"); StringBuffer sb = new StringBuffer("C#"); public void strcat(String str, StringBuffer sb) { str = str + " study"; sb = sb.append(" exam"); } public static void main(String args[]) { Example ex = new Example(); ex.strcat(ex.str, ex.sb); System.out.println(ex.str); System.out.println(ex.sb); }}程序的输出结果是：______

阅读程序，下面的哪个选项是正确的？（ ）。 class ExSuper{ String name; String nick_name; public ExSuper(String s,String t) { name = s; nick_name = t; } public String toString(){ return name; } } public class Example extends ExSuper{ public Example(String s,String t){ super(s,t); } public String toString(){ return name +"a.k.a"+nick_name; } public static void main(String args[]){ ExSuper a = new ExSuper(“First”,“1st”); ExSuper b = new Example(“Second”,“2nd”); System.out.println(“a is”+a.toString()); System.out.println("b is"+b.toString()); } }

程序运行的结果是： good and gbc。（ ） public class Example{ String str=new String(“good”); char[]ch={‘a’,'b’,'c’}; public static void main(String args[]){ Example ex=new Example(); ex.change(ex.str,ex.ch); System.out.print(ex.str+” and “); Sytem.out.print(ex.ch); } public void change(String str,char ch[]){ str=”test ok”; ch[0]=’g'; } }

对于下列代码： public class Example{ String str=new String("java"); char ch[]={'d','b','c'}; public static void main(String args[]){ Example ex=new Example(); ex.change(ex.str,ex.ch); System.out.println(ex.str+" and "+ex.ch[0]); } public void change(String str,char ch[]){ str="world";ch[0]= 'b'; } } 输出结果是: ( ) A: javaandd B: javaand C: javaandc D: javaanda

阅读下列程序public class Example public static void main(String[]

“for” statement in Python can be used to iterate on any sequence, for example, list, string and tuple.

下列程序运行的结果是______。 　　public class Example{ 　　String str=new String("good"); 　　char[]ch={’a’,’b’,’c’}; 　　public static void main(String args[]){ 　　Example ex=new Example(); 　　ex.change(ex.str,ex.ch); 　　System.out.print(ex.str+" and "); 　　System.out.print(ex.ch); 　　} 　　public void change(String str,char ch[]){ 　　str="test ok"; 　　ch[0]=’g’; 　　} A: good and abc B: good and gbc C: test ok and abc D: test ok and gbc

给出以下代码，请问插入以下哪些语句可以使程序编译通过？（ ）class Base{public Base(int i){}}public class Example extend Base{public static void main (String arg[]){Example e = new Example(10);}Example(int i){Super(i);}Exanple(String s, int i){this(i);//插入代码处}}请选择一个正确答案： A: Example d = new Example(); B: Super(); C: This(“Hello”,10); D: Base b = ne Base(10);

“for” statement in Python can be used to iterate on any sequence, for example, list, string and tuple. A: 正确 B: 错误