类的静态成员

package Class;

public class Ca {
    int a;
    static int b;
    public static void m1(){
        Ca ca = new Ca();
        ca.a = 10;
        b = 10;
    }
    public void m2(){
        a = 5;
        b = 5;
    }
    public static void m3(){
        m1();
        Ca k = new Ca();
        k.m2();
    }

    public static void main(String[] args) {
        Ca s1 = new Ca();
        Ca s2 = new Ca();
        Ca.b = 5;
        s1.b = 6;
        s2.b = 7;
        System.out.println("Ca.b="+Ca.b);
        System.out.println("s1.b="+Ca.b);
        System.out.println("s2.b="+Ca.b);
    }
}