import java.lang.Character;public class Characters { public static void main(String args[]){
Characters a=new Characters();
// Boolean s1=a.isLetters("b");
System.out.println("this is "+Character.isLetter('3'));
System.out.println("this is "+Character.valueOf('f'));
System.out.println("this is "+a.charValue());
System.out.println("this is "+a.hashCode());
System.out.println("this is "+Character.digit('3',10));
} }
Characters.java:12: 找不到符号
符号: 方法 charValue()
位置: 类 Characters
System.out.println("this is "+a.charValue());
^
1 错误
Characters a=new Characters();
// Boolean s1=a.isLetters("b");
System.out.println("this is "+Character.isLetter('3'));
System.out.println("this is "+Character.valueOf('f'));
System.out.println("this is "+a.charValue());
System.out.println("this is "+a.hashCode());
System.out.println("this is "+Character.digit('3',10));
} }
Characters.java:12: 找不到符号
符号: 方法 charValue()
位置: 类 Characters
System.out.println("this is "+a.charValue());
^
1 错误
Characters a=new Characters();
// Boolean s1=a.isLetters("b");
System.out.println("this is "+Character.isLetter('3'));
System.out.println("this is "+Character.valueOf('f'));
System.out.println("this is "+a.charValue()); //输出“this is a”
System.out.println("this is "+a.hashCode());
System.out.println("this is "+Character.digit('3',10));
}
/**
* 为你自己的类定义一个charValue()方法
* @return
*/
public char charValue(){
return 'a';
}
}