char[] b=a.toCharArray()举例子
时间: 2024-06-09 15:05:18 浏览: 8
假设有一个字符串 `a`,其内容为 `"Hello World"`,我们想将其转换为字符数组,可以使用以下代码:
```java
String a = "Hello World";
char[] b = a.toCharArray();
```
此时,字符数组 `b` 的内容为:`['H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd']`。这样就可以对字符串中的每个字符进行操作,例如遍历、修改等。
相关问题
char arr[] = a.toCharArray();
This line of code converts a string variable "a" into a character array "arr".
In Java, strings are represented as a sequence of characters, and character arrays are used to store and manipulate characters. The toCharArray() method is a built-in function in Java that converts a string into an array of characters.
Once the string is converted to a character array, we can access each character in the array using its index. For example, arr[0] would give us the first character in the string.
char[]a=str.toCharArray();
This line of code converts a String object named "str" into an array of characters.
Here is a breakdown:
- "char[]" is the data type of the array that we are creating. It specifies that the array will hold characters.
- "a" is the name of the array that we are creating.
- "str.toCharArray()" is a method call that converts the String object "str" into an array of characters. This method is part of the String class in Java.
Overall, this line of code is useful when we want to work with individual characters in a String. By converting the String into an array of characters, we can access and manipulate each character in the String more easily.
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