将字符串转换为大写和小写的 Java 程序。
示例
import java.lang.*; public class StringDemo { public static void main(String[] args) { // converts all upper case letters in to lower case letters String str1 = "SELF LEARNING CENTER"; System.out.println("string value = " + str1.toLowerCase()); str1 = "TUTORIALS POINT"; System.out.println("string value = " + str1.toLowerCase()); // converts all lower case letters in to upper case letters String str2 = "This is TutorialsPoint"; System.out.println("string value = " + str2.toUpperCase()); str2 = "www.tutorialspoint.com"; System.out.println("string value = " + str2.toUpperCase()); } }
输出
string value = self learning center string value = tutorials point string value = THIS IS TUTORIALSPOINT string value = WWW.TUTORIALSPOINT.COM
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