Java遍历字符串并反转字符串

public class testString {

public static void main(String[] args){

String str = "abcdef123";

System.out.println("遍历字符串：");

for (int i = 0; i < str.length(); i++) {

char c = str.charAt(i);

System.out.print(c + " ");

}

//反转字符串

System.out.println();

System.out.println("字符串反转之后：");

for (int j = str.length()-1; j >= 0; j--) {

char a1 = str.charAt(j);

System.out.print(a1 + " ");

}

}

}

运行结果：