public class ConversionDemo {
public static void main(String[] args){
//自动类型转换
double d = 10;
System.out.println(d);

//定义byte类型的变量
byte b = 10;
short s = b;
int i = b;
//这是不可以的,类型不兼容
//char c =b;

//强制类型转换
int k = (int)88.88;
System.out.println(k);

}
}

Java之类型转换_java