静态变量

//静态变量,static可以修饰变量，方法，代码块public class StaticCountTest1 {public static int count=0;//声明并初始化静态变量countpublic int selcount=0;public static int a1=10;public static int a2;public StaticCountTest1(){//构造方法中count和selcount自增1，a1和a2均赋值为20count++;selcount++;a1=a2=20;}public static void main(String[] args) {//创建3个对象StaticCountTest1 s1=new StaticCountTest1();StaticCountTest1 s2=new StaticCountTest1();StaticCountTest1 s3=new StaticCountTest1();//打印成员变量的值System.out.println("静态变量count="+StaticCountTest1.count);System.out.println("对象s1,s2,s3的selcount值分别为："+s1.selcount+","+s2.selcount+","+s3.selcount);System.out.println("静态变量a1="+StaticCountTest1.a1+",静态变量a2="+StaticCountTest1.a2);}}