final和static关键字简介说明

static:
    此变量只能保存一份副本
final:
    修饰的变量保证变量不可修改

 
public class TestClass {
    public static void main(String[] args)  {
        MyClass myClass1 = new MyClass();
        MyClass myClass2 = new MyClass();
        System.out.println(myClass1.i);
        System.out.println(myClass1.j);
        System.out.println(myClass2.i);
        System.out.println(myClass2.j);
    }
}
 
class MyClass {
    public final double i = Math.random();
    public static double j = Math.random();
}