java方法调用（1）

public class Test1 {public static void main(String[] args) {double c=10;double k=5;double s=area(c,k);double z=perimeter(c,k);System.out.println("长方形的面积："+s);System.out.println("长方形的周长："+z);}public static double area(double a,double b){double area=a*b;return area;}public static double perimeter(double a,double b){double per=(a+b)*2;return per;}}

public class Test {public static void main(String[] args) {int a=2;int b=3;int c=add(a,b);System.out.println(c);System.out.println(a);}private static int add(int a, int b) {a=8;return a+b;}}