Convert long to integer in Java

In java, a long value has 64 bits and it is a signed value ranging from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 inclusively. An int value has 32 bits and it is also a signed value ranging from -2,147,483,648 to 2,147,483,647 inclusively. 

To convert a long value that is in the range of -2,147,483,648 to 2,147,483,647, you can directly cast it to int.

      long a = 33444556L;
      int b = (int)a;

However, if the long value is out of the -2,147,483,648 to 2,147,483,647 range, casting returns -1.

Here is a sample code for testing the conversion.

public class LongToIntegerTest {
    public static void main(String[] args){
        long x1 = 2147483647L;
        int y1 = (int)x1;
        Long x12 = new Long(x1);
        int y12 = x12.intValue();
        
        long x2 = 9223372036854775807L;
        int y2 = (int)x2;
        Long x22 = new Long(x2);
        int y22 = x22.intValue();
        
        System.out.println("y1 = "+y1);
        System.out.println("y12 = "+y12);
        System.out.println("y2 = "+y2);
        System.out.println("y22 = "+y22);
    }

}

Output:
y1 = 2147483647
y12 = 2147483647
y2 = -1
y22 = -1

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