JAVA基本數據類型之間互轉
package JAVA_Project_01_02;
public class BasicTypeChange {
private void typeAutoUpgrade(){
byte b=44;
char c='b';
short s=1024;
int i =40000;
long l =124631;
float f=35.67f;
double d=3.1234d;
double result=(f*b)+(l*f)+(i/c)-(d*s);
System.out.println("結果:"+result+"=");
System.out.println((f*b)+"+"+(l*f)+"+"+(i/c)+"-"+(d*s));
}
private void autoChange(){
char c='a';
byte b=44;
short s0=b;
int i0=s0;
int i1=c;
long l=i0;
float f=l;
double d=f;
float fl=1.7f;
double dou=fl;
System.out.println("fl="+fl+";dou="+dou);
fl=(float)dou;
System.out.println("fl="+fl+";dou="+dou);
}
private void forceChange(){
double d=123.456d;
float f=(float)d;
long l=(long)d;
int i=(int)d;
short s=(short)d;
byte b = (byte) d;
System.out.println("d="+d+";f="+f+";l="+l);
System.out.println(";i="+i+";s="+s+";b=+b");
d=567.89d;
b=(byte)d;
System.out.println("d="+d+";b="+b);
}
public static void main(String[] args) {
BasicTypeChange change=new BasicTypeChange();
change.typeAutoUpgrade();
change.autoChange();
change.forceChange();
}
}