Learn about the pits that Java encounters

1.

About Java coercion Type conversions
int x = 1;
Byte y = 2;
byte z = 0;
1). z = (byte) (x+y);//forced type conversion succeeded
2). z = (byte) x+y;//forced type conversion error, loss accuracy
The second way to convert X to byte is to give an error.

Resolution: Byte short int is an int after each other, including Byte+byte,short+short, if the three and long types are mutually counted as long types

View the Java code for the variable type/*class Test {public static void main (string[] args) {int i=1; System.out.println (GetType (i)); public static String GetType (Object o) {return O.getclass (). toString (); */

　　

Learn about the pits that Java encounters