Java help

Hey guys I need help with my java coding. I'm required to write a code that takes 3 numbers (user input) and sort them from smallest to largest. Can someone show me how to code this?

void aMethod(){
try{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int num1 = Integer.parseInt(br.readLine());
int num2 = Integer.parseInt(br.readLine());
int num3 = Integer.parseInt(br.readLine());
br.close();
int tmp;
if(num1 < num2){
tmp = num1;
num1 = num2;
num2 = tmp;
}
if(num1 < num3){
tmp = num1;
num1 = num3;
num3 = tmp;
}
if(num2 < num3){
tmp = num2;
num2 = num3;
num3 = tmp;
}
// sorted
}catch(IOException e){
System.out.println("Not a number.");
}
}