How do you turn a string into an integer?

how do you turn a string into an integer?
for ex, if i wanted to turn the string "5" into the integer 5, how would i do that?

String stringNumber="5";
try{
int number=Integer.parseInt(stringNumber);
}catch(NumberFormatException e){
System.out.println("The string "+stringNumber+" must be a number!");
}

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