Java改变引用数据类型的值 在Java中,引用数据类型的数据传递的是值(地址)的拷贝 对于以下代码 class BirthDate { private int day; private int month; private int year; public BirthDate(int d, int m, int y) { day = d; month = m; year = y; } public void setDay(int d) { day = d; } public void setM
一.通过static修饰的成员变量初始化只会初始化一次 //静态变量初始化只会初始化一次 public class zuishuai { public static void main(String[] args) { // TODO Auto-generated method stub //double[] my = new double[14]; people a = new people(); a.num+=1; System.out.println("现已创建人数:"+a.nu
import java.util.*; class test { public static void main(String[] args) { char a[] = {'b', 'a', 'c'}; String b = "111"; f(a,b); System.out.println(Arrays.toString(a)+" "+b); } public static void f(char[] a, String b) { a[1] = 'c'; b =