String[] str = {"a","b","c","d","e"}; 或String[] sql = new String[] {};

1、对String定义与赋值时使用：
String[] str = {"a","b","c","d","e"};
和String[] sql = new String[] {"a","b","c","d","e"};的区别是什么？
2、定义就是指String[] str;
赋值和初始化是指：str = {"a","b","c","d","e"};或str = ew String[] {"a","b","c","d","e"};?

谢谢！

最新回答

微浅笑°

2024-12-02 06:35:05

首先这两种方式都是创建了字符串数组。
但是第一种方式只创建了一个String[]数组对象str。
第二种方式创建了两个String[]数组对象sql和 new String[] {"a","b","c","d","e"}，相当于我创建了 new String[] {"a","b","c","d","e"};这个对象，然后把这个对象的引用赋给sql对象。

其实我过得并不好

2024-12-02 09:01:08

前面一个创建了一个对象，后面一个创建了2个对象，前面一个先检查存在{"a","b","c","d","e"}不，存在就直接赋值，不存在就先创建再赋值，后面始终是先创建再赋值，从效率上来讲，前面那个更高

万花丛中一朵菊

2024-12-02 09:33:08

String[] str = {"a","b","c","d","e"}; 隐式调用string实例化

String[] sql = new String[] {}; 显示调用string实例化

效果一样的！！

大众电灯泡！

2024-12-02 06:28:21

1..两个没有什么区别..都是一样的..

2..是那样的..前面是定义..后面是赋值..

帅癌晚期

2024-12-02 07:48:43

方式一样，且创建的对象也是一样的。

我要回答

匿名回答

String[] str = {"a","b","c","d","e"}; 或String[] sql = new String[] {};

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