编程题按指定的要求编写程序段,1．编写一个程序，把六个按钮分别标识为‘A’至‘F’，并排列成一行。参考程序：importjava.awt.*;publicclassMyClass{publicstaticvoidmain(Stringargs[]){String[]labels={"A","B","C","D","E","F"};Windowwin=newFrame();win.setLayout(newGridLayout(1,6));for(inti=0;ijavatest4_1Remove3randomcharactersfromINTERESTING:INEETINGRemove6randomcharactersfromINTERESTING:EESTNC:\>javatest4_1Remove3randomcharactersfromINTERESTING:ITERETINRemove6randomcharactersfromINTERESTING:IEESG下面是不包括removeRandChar()方法的test4_1应用程序：publicclasstest4_1{publicstaticvoidmain(String[]args){Stringword1=removeRandChar("INTERESTING",3);System.out.println("Remove3randomcharactersfromINTERESTING:"+word1);word1=removeRandChar("INTERESTING",6);System.out.println("Remove6randomcharactersfromINTERESTING:"+word1);}/**Thismethodremovesthecharacteratposition:indexNum,fromtheString:str,andreturnstheresultingString.*/privatestaticStringremoveSingChar(Stringstr,intindexNum){returnstr.substring(0,indexNum)+str.substring(indexNum+1);}……}参考程序：2privatestaticStringremoveRandChar(Stringstr,inthowMany){if(str.length()<=howMany)return"";intrandNo;for(intj=0;jother.examMark)System.out.println(name+"didbetterthan"+other.name);elseSystem.out.println(name+"didworsethan"+other.name);}}要求完成test4_3的编程，它将创建两个Student对象并调用相应的方法，产生的输出如下所示：C:\>javatest4_3张楠got70inthetestand85intheexam李浩got80inthetestand90intheexam李浩'sexammarkchangedto40李浩didworsethan张楠注意不能使用任何System.out.print()或System.out.println()语句，产...
