Convert long data type to int type in java

Converting from int type to long type is upconverting, and you can directly perform implicit conversion, but converting from long type to int type is downconverting, and data overflow may occur:

The following conversion methods are mainly for reference:

1. Forced type conversion

 long ll = 300000; int ii = (int)ll;

2. Call the intValue() method

 long ll = 300000; int ii= new Long(ll).intValue();

3. First convert long into a string String, and then convert the line into an Integer

 long ll = 300000; int ii = Integer.parseInt(String.valueOf(ll));

These three methods are simpler and clear.