Simple function java String to Int / Reverse

Simple function java String to Int / Reverse

I want to generate a String with 11 digits from an ID. For example : an account with an ID=12 give 00000000012

And after that I need to retrieve this id from the string.

For example : a string with 00000000022 give an ID=22

Comments

Tips For AllFebruary 25, 2012 at 1:42 PM
To format the string, use String.format:

int n = 123;
String.format("%011d", 123);
// ===> 00000000123

To get the number back from string, use Integer.parseInt:

Integer.parseInt("00000000123");
// ====> 123
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Tips For AllFebruary 25, 2012 at 1:42 PM
Depending on how many leading zeroes:

int id = 12;
String number = "000000000" + id;

To get the int back:

Integer.parseInt(number)
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Tips For AllFebruary 25, 2012 at 1:42 PM
As mentioned in the other answer from String to int use Integer.parseInt()

However, for creating the String I would suggest:

for(int x=0;x<10;x++){
thestring="0"+thestring;
}

replace 10 with how many zeros you need.

Also you could just use java.text.DecimalFormat, your choice.

Or combine both:

int lengthID=10;
String zeros="";
for(int x=0;x<lengthID;x++){
zeros="0"+zeros;
}
java.text.DecimalFormat id=new java.text.DecimalFormat(zeros);
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