程序为什么报错？

Question

public class CharacterCompare {

public static void main(String args[]) {

Character char1 = new Character('h');

Character char2 = new Character('H');

boolean b = char1.equals(char2);

System.out.println(char1+"和"+char2+"是否相等："+b);

Character char3 = Character.toLowerCase(char1);

Character char4 = Character.toLowerCase(char2);

boolean bb = char3.equals(char4);

System.out.println(char3+"和"+char4+"是否相等："+bb);

}

}

Answer 1

jdk版本？clean一下项目试试

Answer 2

查看导包是否正确

Answer 3

代码没错，重启下eclipse试试

Answer 4

我复制了你的代码 在myeclipse 中 运行了 没有错啊 你再试试