Java中基本数据类型的默认值，初始值

public class demo1 {
    public static void main(String[] args) {

        Variable v = new Variable();
        System.out.println("byte类型的初始值为" + v.byteNum);
        System.out.println("short类型的初始值为" + v.shortNum);
        System.out.println("int类型的初始值为" + v.intNum);
        System.out.println("long类型的初始值为" + v.longNum);
        System.out.println("float类型的初始值为" + v.floatNum);
        System.out.println("double类型的初始值为" + v.doubleNum);
        System.out.println("boolean类型的初始值为" + v.flag);
    }
}
class Variable {
    byte byteNum;
    short shortNum;
    int intNum;
    long longNum;
    float floatNum;
    double doubleNum;
    boolean flag;
}

byte类型的初始值为0

short类型的初始值为0

int类型的初始值为0

long类型的初始值为0

float类型的初始值为0.0

double类型的初始值为0.0

boolean类型的初始值为false