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：______

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

下面程序最后输出的结果是( )public class A{ String str=new String(“good”); char[] ch={‘a’,’b’,’c’}; public static void main(String args[]){ A ex=new A(); ex.change(ex.str,ex.ch); System.out.print(ex.str+””+ex.ch[0]); } public void change(String str,char ch[]){ str=”test ok”; ch[0]=’g’; }} A: good a B: good g C: test ok a D: test ok g

下列选项中，定义空字符串正确的是() A: name=str(6) B: ex= "" C: ex="""Hello,Python""" D: ex=" "

给定以下代码，程序的运行结果是 （）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: goodandabc B: goodandgbc C: test okandabc D: test okandgbc

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

剪切图线实体需用 命令。 A: EX B: TR C: STR D: CHA

对于下列代码:publicclassExample{Stringstr=newString("hello");charch[]={'d','b','c'};publicstaticvoidmain(Stringargs[]){Exampleex=newExample();ex.change(ex.str,ex.ch); System.out.println(ex.str+"and"+ex.ch[0]); } publicvoidchange(Stringstr,charch[]){str="world";ch[0]='a';}}输出结果是:

【单选题】ex amine A. ex pert B. ex cellent C. ex press D. ex ample A. ex pert B. ex cellent C. ex press D. ex ample