Parse long value from string

static long parseLong(String s)

Parses the string argument as a signed decimal long.

static long parseLong(String s, int radix)

Parses the string argument as a signed long in the radix.

static Long valueOf(long l)

Returns a Long instance representing the specified long value.

static Long valueOf(String s)

Returns a Long object holding the value of the specified String.

static Long valueOf(String s, int radix)

Returns a Long holding the value from the String with the radix.

public class Main {
  public static void main(String[] args) {
    System.out.println(Long.parseLong("12345"));

  }
}

The output:

12345

To convert or parse string with radix,

public class Main {
  public static void main(String[] args) {
    System.out.println(Long.parseLong("10",8));

  }
}

The output:

8

1. Long class
2. Constants value from Long class
3. Constructors from Long
4. Convert long value to byte, double, float, int, long, short
5. Decode a string to create long value
6. Get the long value from a system property
7. Compare two long values
8. Parse long value from string
9. Convert long value to binary, hex and octal format strings
10. Convert long value to string
11. Get the sign of the long value
12. Get the number of zero bits preceding and following
13. Reverse and rotate a long value