参考代码:
import java.util.Scanner; public class Main7 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub //2236: [蓝桥杯][算法训练]大小写转换 Scanner scanner=new Scanner(System.in); String s=scanner.next(); char [] a=s.toCharArray(); for (int i = 0; i < a.length; i++) { if (a[i]<'a') { a[i]+=32; }else { a[i]-=32; } } for (int i = 0; i < a.length; i++) { System.out.print(a[i]); } } }
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