Java构造方法小例子

package 面向对象练习扩展;public   class Number {private int n1;private int n2;Number(int a,int b){n1=a;n2=b;}public static int addition(int x,int y){return(x+y);}public static int subtration(int x,int y){return(x-y);}public static int multiplication(int x,int y){return(x*y);}public static double divisionStatic(int x,int y){if(y==0){System.out.println("除数不能为0！");return 0;}else{return (x*1.0)/y;}}public static void main(String[] args) {// TODO Auto-generated method stubint sum=addition(2,3);System.out.println("2+3="+sum);int a=subtration(5,3);System.out.println("5-3="+a);int b=multiplication(5,3);System.out.println("5*3="+b);double c=divisionStatic(5,3);System.out.println("5/3="+c);}}