Java程序将字符串转换为小写和大写。
示例
import java.lang.*;
public class StringDemo {
public static void main(String[] args) {
//将所有大写字母转换为小写字母
String str1 = "SELF LEARNING CENTER";
System.out.println("string value = " + str1.toLowerCase());
str1 = "nhooo.com";
System.out.println("string value = " + str1.toLowerCase());
//将所有小写字母转换为大写字母
String str2 = "This is nhooo";
System.out.println("string value = " + str2.toUpperCase());
str2 = "www.nhooo.com";
System.out.println("string value = " + str2.toUpperCase());
}
}输出结果
string value = self learning center string value = nhooo.com string value = THIS IS nhooo string value = WWW.nhooo.COM
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