This Java code defines a class called Soal07 that contains a main method for managing a student mark list. The main method uses Scanner objects to accept user input. It displays a menu with options to input student data, view all data, edit data, or exit. Based on the user's selection, it will either prompt the user to enter information for multiple students, display an existing student's data, or allow editing of an existing student's data by re-prompting for input. All student data, including name, ID, and mark, is stored in arrays.

1. import java.util.Scanner;
public class Soal07
{
public static void main(String[] Args)
{
int jumlah=0,i=0,nilai[]={0,0,0,0,0},flag,jawab=0,no=0;
String namaKelas,namaMhs[]={"","","","",""},nim[]={"","","","",""};
Scanner input = new Scanner(System.in);
Scanner inputInt = new Scanner(System.in);
do{
System.out.println(" Student Mark List");
System.out.println("n1. Input Student");
System.out.println("2. See All Data");
System.out.println("3. Edit Data");
System.out.println("4. Exit");
do{
flag=0;
try
{
System.out.print("nInput Your Choice [1-4] ? ");
jawab = inputInt.nextInt();
}
catch(Exception e)
{
System.out.println("nWrong Input!n");
inputInt.nextLine();
flag=1;
}
}while(flag==1 || jawab>4 || jawab<1);
if(jawab==1)
{
do{
flag=0;
try
{
System.out.print("nHow many student [1-5] ?
");
jumlah = inputInt.nextInt();
}
catch(Exception e)
{
System.out.println("nWrong Input!n");
inputInt.nextLine();
flag=1;
}
}while(flag==1 || jumlah>5 || jumlah<1);
System.out.println("nPlease input data of " + jumlah +
" people");
for(i=0;i<jumlah;i++)
{
System.out.print("n" + (i+1));
do{
System.out.print(" Please input Student Id
[10]= ");
nim[i] = input.nextLine();
}while(nim[i].length()!=10);
System.out.print(" Please input Student Name =
");
namaMhs[i] = input.nextLine();

2. do{
flag=0;
try
{
System.out.print(" Please input
Student Mark [0-100] = ");
nilai[i] = inputInt.nextInt();
}
catch(Exception e)
{
System.out.println("n Wrong
Input!n");
inputInt.nextLine();
flag=1;
}
}while(flag==1 || nilai[i]>100 || nilai[i]<0);
}
}
else if(jawab==2)
{
if(jumlah!=0)
{
System.out.println("nThere is already " + jumlah
+ " data");
for(i=0;i<jumlah;i++)
{
System.out.println((i+1) + ". " +
namaMhs[i]);
}
do{
System.out.print("nPlease input student no
[1-" + jumlah + "] ? ");
flag=0;
try
{
no = inputInt.nextInt();
}
catch(Exception e)
{
System.out.println("nWrong
Input!n");
inputInt.nextLine();
flag=1;
}
}while(flag==1 || no>jumlah || no<1);
System.out.println("nStudent with No " + no + "
is");
System.out.println("Student ID = " + nim[no-
1]);
System.out.println("Student Name = " +
namaMhs[no-1]);
System.out.println("Mark = " + nilai[no-
1]);
}
}
else if(jawab==3)
{
if(jumlah!=0)
{
System.out.println("nThere is already " + jumlah
+ " data");
do{
System.out.print("nPlease input student no
[1-" + jumlah + "] ? ");

3. flag=0;
try
{
no = inputInt.nextInt();
}
catch(Exception e)
{
System.out.println("nWrong
Input!n");
inputInt.nextLine();
flag=1;
}
}while(flag==1 || no>jumlah || no<1);
System.out.println("nStudent with No " + no + "
is");
System.out.println("Student ID = " + nim[no-
1]);
System.out.println("Student Name = " +
namaMhs[no-1]);
System.out.println("Mark = " + nilai[no-
1]);
do{
System.out.print("nPlease input Student ID
[10]= ");
nim[no-1] = input.nextLine();
}while(nim[no-1].length()!=10);
System.out.print("Please input Student Name = ");
namaMhs[no-1] = input.nextLine();
do{
flag=0;
try
{
System.out.print("Please input Student
Mark [0-100] = ");
nilai[no-1] = inputInt.nextInt();
}
catch(Exception e)
{
System.out.println("n Wrong
Input!n");
inputInt.nextLine();
flag=1;
}
}while(flag==1 || nilai[no-1]>100 || nilai[no-
1]<0);
}
}
System.out.println("nnn");
}while(jawab!=4);
}
}