Java 基础题目集锦

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1、Java基础题目集锦【本人自己对照树上的问题进行的解答，】【1】importjava.util.Scanner;publicclassAdd{publicstaticvoidmain(String[]args){finalintNUM=10;System.out.println("***********************************************************");System.out.println("t欢迎使用加法测试小游戏");System.out.println();System.out.println("====

2、====================================================");System.out.println("Let'sBegin:");System.out.println("——————");System.out.println("请选择加法范围：[0]--10以内t[1]--100以内t[2]--1000以内");Scannerscan=newScanner(System.in);intflag;flag=scan.nextInt();intGO=10;while(flag<0

3、

4、flag>3){System.o

5、ut.print("请重新选择加法范围：");flag=scan.nextInt();}switch(flag){case0:GO=10;break;case1:GO=100;break;default:GO=1000;}intcount1=0,count2=0;intc;while(count1+count2

6、{System.out.println("WellDone!");count1++;}else{System.out.println("YouNeedMorePractice");count2++;}}System.out.println("YourGradesAre:"+(count1*10-count2*10));switch(count1){case10:System.out.println("YouAreSoClever");break;case9:System.out.println("YouAreExclent");break;case8:Syste

7、m.out.println("YouAreHardworking");break;case7:System.out.println("YouAreGood");break;case6:System.out.println("YouNeedWordHard");break;default:System.out.println("YoushouldStudyHard");}System.out.println("TranksForUsing.....");}}88888888888888888888888888888888888888888888888888888888

8、88888888888888888888888【2】importjava.util.Scanner;//importjava.swing.JFrame;importjava.util.Random;publicclassaverage{publicstaticvoidmain(String[]args){inta,b,c;/*Scannerscan=newScanner(System.in);System.out.print("Entera:");a=scan.nextInt();System.out.print("Enterb:");b=scan.nextInt(

9、);System.out.print("Enterc:");c=scan.nextInt();doubleave=(a+b+c)/3.0;System.out.println("ave="+ave);System.out.println("HelloWorld!");Stringphrase="Changeisinevitable";Stringm1,m2,m3,m4,m5;booleant1,t2;charc1;ints;System.out.println("Originalstring:"+phrase);System.out.println("L