public class Shujuzhuanhuan2
{
public static void main(String[] args)
{
//byte的取值范围： -128~127
byte b=200;
System.out.println(b)；
}
}
public class Shujuzhuanhuan2
{
public static void main(String[] args)
{
//byte的取值范围： -128~127
byte b=（byte）200;
System.out.println(b)；
}
}
public class Shujuzhuanhuan2
{ public static void main(String[] args) { short s=123; int i=50000; s=i; System.out.println(s); }}
public class Shujuzhuanhuan2
{ public static void main(String[] args) { short s=123; int i=50000; s=i; System.out.println(s); }} 
public class Shujuzhuanhuan2
{ public static void main(String[] args) { long l=123456;long l2=8888888888;
System.out.println(l2);
}} 
public class Shujuzhuanhuan2
{ public static void main(String[] args) { long l=123456;long l2=8888888888L;
System.out.println(l2);
}}8888888888的数据类型默认为int型，数据超出int数据类型的长度。
public class Shujuzhuanhuan2
{ public static void main(String[] args) { float f=12.345;System.out.println(f);
}}
public class Shujuzhuanhuan2
{ public static void main(String[] args) { float f=12.345f;System.out.println(f);
}}
class Shujuzhuanhuan1
{ public static void main(String[] args) { int a,b,c; a=2; b='q'; // 113 c=4; System.out.println(a); System.out.println(b); System.out.println(c);
g += b;
System.out.println(g);
b += 0.3; b = (int)(b + 0.3); System.out.println(b);
c += f? 2:4;
System.out.println(c);
float h = (float)12.5;
float i = (float)14.5; e = (byte)(h + i); e += h; a += 2147483646; float j = (float)(h / 0.5); System.out.println(e); System.out.println(h); System.out.println(g);
}
}