I am studying Programming and trying to get my assignment to work

the problem is with the MAINTENANCE PART in red I can get it to work!
Can anyone help!!!!

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public class Assignment2 {
static final int TotalCans = 50; // The total number of cans avaliable
static String Drinks[] ={"Coke", "Sprite", "Water", "Orangina"};
static String Price[] ={"40p", "50p", "80p", "70p"};
static String Coins[] ={"10", "10", "10", "10"};
static String Accept[] ={"5p", "10p", "20p", "50p"};
public static void main(String arg[])

{
/*-- initial setting--------------------------*/
int Cans[] = new int[4];
for (int i=0; i<4; i++)
Cans[i]=(int)(TotalCans*Math.random());

//Then goes the major part of selecting and executing either BUY or Mainenance, each presented with a specific method.
/*-- user’s action menue to choose from----- */
int MenueItem=1;
while (MenueItem!=0){
MenueItem=menue();// a method GO TO QUIT
if (MenueItem==1)
MAINTENANCE(Cans); // a method GO TO MAINTENANCE
else if (MenueItem==2)
Cans=BUY(Cans); // a method BUY A DRINK

}//end of while for choosing action
} //end of main

/*--------- three methods,
menue,
Mainenance,
BUY
to specify----------------------------------*/
/*--‘BUY A DRINK’ to select performance and number of Cans: transform array of booked Cans --- */

public static int[] BUY(int[] per){
for (int i=0;i<per.length;i++)
TextIO.putln((i+1) + "- A can of "+ Drinks[i] + " costs " + Price[i] + " ");
TextIO.putln();
TextIO.putln("Select 1,2,3,4 to select a drink ");
int choice;
choice = TextIO.getInt()-1;
//adjust to indexing
TextIO.putln();
if (per[choice] == TotalCans) {
TextIO.putln("This "+ (choice+1) + " is sold out");
}
else {
TextIO.putln("This machine only accepts 5p, 10p, 20p and 50p coins. Please insert your coins");
int NoOfCans = TextIO.getInt();
int diff=TotalCans-per[choice];
if (NoOfCans > diff)
TextIO.putln("We have only " + diff + " Cans remaining in the machine");
else { // per[choice] = per[choice] + NoOfCans;
per[choice]+=NoOfCans;
TextIO.putln("You have purchased " + NoOfCans + " Cans of ");
}
} // end of else.
return per;
}// end of method BUY

/*--‘BUY’ to select performance and number of Cans: transform array of booked Cans --- */

//------------------------------------------------------------------------------------------------------------------*/
/*--- ‘ONE/MAINTENANCE’ for outputting statistics--- */

public static int[] MAINTENANCE(int[] machine){
TextIO.putln("Want to perform Maintenance checks? ");
TextIO.putln("1 - The amount of cans of each type of drink available currently"); //ISSUE 1
TextIO.putln("2 - The total amount of cans in the machine = "); //ISSUE 2
TextIO.putln("3 - The amount of coins of each denomination there is in this machine currently"); // ISSUE 3
TextIO.putln("4 - The amount of money in total there is in the machine currently ");// ISSUE 4
TextIO.putln();
TextIO.putln("Select 1,2,3,4 to pick which MAINTENANCE check ");
int choice2;
choice2 = TextIO.getInt()-1;
}
}
return machine;
}
class MAINTENANCE2(int [] arr){
switch (int choice2) {
case 1 : {
int ii=0; ii<arr.length; ii++)
TextIO.putln("There are " + arr[ii] + " cans of " + Drinks[ii]+" left");
break; //1 - The amount of cans of each type of drink available currently
}
case 2 : {
TextIO.putln("The total amount of cans in the machine = ? ");
break; //2 - The total amount of cans in the machine
}
case 3 : {
int ii=0; ii<arr.length; ii++)
TextIO.putln("There are " + arr[ii] + " coins of " + Drinks[ii]+" left");
break; //3 - The amount of coins of each denomination there is in this machine currently
}
case 4 : {
TextIO.putln("There is ? in total in this machine ");
break; //4 - The amount of money in total there is in the machine currently
}
}
}
getMaintenance2(){
return MAINTENANCE2;
//------------------------------------------------------------------------------------------------------------------*/

/*--- ‘MENUE’ for choosing action----------- */
public static int menue() {
TextIO.putln();
TextIO.putln("Please enter a number: ");
TextIO.putln(" 0 - to quit ");
TextIO.putln(" 1 - to get a Mainenance ");
TextIO.putln(" 2 - to BUY a drink ");
int item=TextIO.getInt();
return item; }
}// End of class Assignment2