Question

How to separate groups of digits in numeric literals with underscore in Java

Answer 1

public class Example {
    public static void main(String[] args) 
    {
        long creditCardNumber = 1234_5678_9101_1129L;

        System.out.println("Credit Card Number: " + creditCardNumber);
    }
}
  
  
/*
run:
  
Credit Card Number: 1234567891011129
  
*/

 

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Answer 2

public class Example {
    public static void main(String[] args) 
    {
        float pi =  3.14_15_92F;
        
        System.out.println("PI: " + pi);
    }
}


  
/*
run:
  
PI: 3.141592
  
*/

 

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Answer 3

public class Example {
    public static void main(String[] args) 
    {
        long socialSecurityNumber = 555_55_5555L;
        
        System.out.println("Social Security Number: " + socialSecurityNumber);
    }
}
  
  
  
/*
run:
  
Social Security Number: 555555555
  
*/

 

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Answer 4

public class Example {
    public static void main(String[] args) 
    {
        long hexLong = 0x5F_3A_DE_BD;
        
        System.out.println("Hex long: " + hexLong);
    }
}


  
/*
run:
  
Hex long: 1597693629
  
*/

 

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Answer 5

public class Example {
    public static void main(String[] args) 
    {
        long hexMaxLong = 0x7fff_ffff_ffff_ffffL;
        
        System.out.println("Hex max long: " + hexMaxLong);
    }
}


  
/*
run:
  
Hex max long: 9223372036854775807
  
*/

 

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Answer 6

public class Example {
    public static void main(String[] args) 
    {
        byte binByte = 0b0010_0111;
        
        System.out.println("binByte: " + binByte);
    }
}



  
/*
run:
  
binByte: 39
  
*/

 

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