Convert long data type to int type in java

Conversion from int type to long type is upward conversion, which can be directly implicitly converted, but conversion from long type to int type is downward conversion, and data overflow may occur:

Mainly as follows: A conversion method, 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 the long into a string String, and then convert it into an Integer

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

These three methods are relatively simple and clear.

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