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如何利用所有的字母java

代码示例

8
0

如何让char大写在java 

char q = Character.toUpperCase('d');
2
0

利用字符串java 

String str = "hello world!";

// capitalize first letter
String output = str.substring(0, 1).toUpperCase() + str.substring(1);

// print the string
System.out.println(output);
// Hello world!

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