public class TestDemo {
public static void main(String[] args) {
double a=13.4;
int b=(int)a;
System.out.println(b);
//运行结果为int b=13, 0.4丢失
int c=12;
byte d=(byte) c;
System.out.println(d);
//运行结果为byte d=12;
int sum1=130;
byte sum2=(byte) sum1;
System.out.println(sum2);
//运行结果为byte sum2=-126;
}
}