Java方法

（1）构造函数

class myclass{    int x;    public myclass(int i) {        x=i;        }}public class Main {  public static void main(String[] args) {    myclass t1=new myclass(10);    myclass t2=new myclass(20);    System.out.println(t1.x+" "+t2.x);  }}

（2）可变参数

public class Main {  public static void main(String[] args) {        printmax(34,3,3,2,56.5);        printmax(new double[]{3,3,5,7,2,3,4,7,82,1});    }    public static void printmax(double... nums){    if(nums.length==0){        System.out.println("No argument passed");        return;    }    double ma=nums[0];    int len=nums.length;    for(int i=1;i<len;i++){        if(nums[i]>ma) ma=nums[i];    }    System.out.println("The max value is: "+ma);  }}