变量的类型

public class Exam5 {
	static int s;//成员变量，类变量
	int i;//成员变量，实例变量
	int j;//成员变量，实例变量
	{
		int i = 1;//非静态代码块中的局部变量 i
		i++;
		j++;
		s++;
	}
	public void test(int j){//形参，局部变量,j
		j++;
		i++;
		s++;
	}
	public static void main(String[] args) {//形参，局部变量，args
		Exam5 obj1 = new Exam5();//局部变量，obj1
		Exam5 obj2 = new Exam5();//局部变量，obj1
		obj1.test(10);
		obj1.test(20);
		obj2.test(30);
		System.out.println(obj1.i + "," + obj1.j + "," + obj1.s); // 2 1 5 
		System.out.println(obj2.i + "," + obj2.j + "," + obj2.s); // 1 1 5
	}
}