定义一个数组String str[] = {"申请ID","流水号"};
为什么不能通过str[] = {"ID","编号"};直接改变数组的值
而只能通过str[0]="ID"; str[1]="编号";来修改//执行下面的语句编译器提示不是一个声明
String str[] = {"申请ID","流水号"};
str[] = {"ID","编号"};//执行下面的语句则是正确
String str[] = {"申请ID","流水号"};
str[0] = {"ID"};
str[1] = {"编号"};大家帮我分析下
为什么不能通过str[] = {"ID","编号"};直接改变数组的值
而只能通过str[0]="ID"; str[1]="编号";来修改//执行下面的语句编译器提示不是一个声明
String str[] = {"申请ID","流水号"};
str[] = {"ID","编号"};//执行下面的语句则是正确
String str[] = {"申请ID","流水号"};
str[0] = {"ID"};
str[1] = {"编号"};大家帮我分析下
还要在内存中开辟引用,即指针。
str[0]和str[1]就是数组的引用”str[] = {"ID","编号"};“
这样当然不能改变数组的值了,数组一旦定义一个数组String str[] = {"申请ID","流水号"};
它的值只能通过数组间的赋值和通过找到相应的内存地址(即str[0]和str[1])来改变值了要向楼主说的,那内存不乱套了吗?
String str1[]={"ID","编号"};
str = str1;
String[] str = new String[] {"申请ID","流水号"};//创建一个新的字符串数组,然后让str指向它
str = new String[] {"ID","编号"};不过这样就是两个不同的数组了你想要的可能是:“java也许应该有个函数,可以方便地、一次赋完”,但是没有:(