package njtcstudent.com;import java.util.Scanner;public class Seond {public static void main(String[] args) {findMax();//给定一组字符，编程输出里面数值最大者reverseOrder();//对数组中每一个元素赋值后，按逆序输出maxToMinOrder();//对给定一整型数组，按从大到小顺序输出printInt();//给定一个字符串，编程输出里面所包含的数字whatNumber();//1000以内的水仙花数}public static void whatNumber() {int ge,shi,bai;int i;for(i=100;i<1000;i++){bai=i/100;shi= i%100/10;ge=i%100%10;if((Math.pow(bai, 3)+Math.pow(shi, 3)+Math.pow(ge, 3))==i)System.out.println(i);}}public static void printInt() {String strThree = "sdf92r2t4h423rj23r2fj23";int len = strThree.length();for(int i=0 ;i<len;i++){if(strThree.charAt(i)>='0'&&strThree.charAt(i)<='9')System.out.println(strThree.charAt(i));}}public static void maxToMinOrder() {int[] intarry = {1,5,7,64,87,125,75,48,96,78,56,128,47,25};int i,j,temp;for(i=0;i<intarry.length;i++)for(j=i+1;j<intarry.length;j++){if(intarry[j]>intarry[i]){temp=intarry[i];intarry[i]=intarry[j];intarry[j]=temp;}}for(i=0;i<intarry.length;i++){System.out.print(intarry[i]+"    ");System.out.println();}}public static void reverseOrder() {String[] strTwo = {"neijiang","shifan","jike","xueyuan","sofeware","third","class"};for(int i=strTwo.length-1;i>=0;i--){System.out.println(strTwo[i]);}}public static void findMax() {Scanner inputOne = new Scanner(System.in);System.out.print("请输入一个字符：");String strlone;strlone = inputOne.next();int max=strlone.charAt(0);int i;for(i=1;i<strlone.length();i++){if(max<strlone.charAt(i))max=strlone.charAt(i);}System.out.println("The max value is:"+(char)max);}}

2、3班的这个。

4班的第二个实验报告，只做了第四个，我写的如下：

package com.njtcstudent.javademo;import java.util.Scanner;public class wuliantwo {public static void main(String[] args) {first();//选择分支结构那个second();//循环结构那个}private static void second() {int i,s=1;for(i=10;i>=1;i--){s=s*i;System.out.println(i);}System.out.println("10！的值为："+s);}private static void first(){Scanner myIn = new Scanner(System.in);System.out.println("请输入一个成绩（百分制）：");int gread;gread = myIn.nextInt();if(gread>=0 && gread<=100){gread=gread%10;switch(gread){case 10:case 9:System.out.println("A");break;case 8:System.out.println("B");break;case 7:System.out.println("C");break;default:System.out.println("E");}}elseSystem.out.println("您输入的成绩有误！");}}