Automatic data type conversion (Java), data type conversion java

Automatic data type conversion (Java), data type conversion java

Public class Test {
Public static void main (String [] args)
{
Int a = 3; // poor
Double B = 1.5; // rich
Double c = a + B; // The addition is rich. If c is defined as an int type, an error is returned.
System. out. println (c );

Char man = 'male ';
String women = 'female ';
String str = man + women;
System. out. println (str );


}
}

Int type level is smaller than double type, and a + B is automatically changed to double type

Similarly, the char type is smaller than the String type and is automatically converted to the String type.