String, char[], StringBuilder conversion

 

1. Convert String to character array

String.toCharArray()

2. Concatenate the string array into a string

String.valueOf(char[])

3. Convert string to number

Integer.valueOf("123")

4. Split the string into multiple substrings with a certain mark

String[] arr = String.split(",") 

5. Concatenate characters into strings

StringBuilder sb = new StringBuilder();
sb.append('1');
sb.append('2');

String str = sb.toString();

 

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Origin blog.csdn.net/qq_34159161/article/details/106869326