java 这个报错是什么意思？

Question

package eclipse;

public class q {
	int age;
	void getAge(int age) {
		this.age=age;
	}
	int showAge() {
		System.out.println("年龄是"+getAge());
	}
    //The method getAge(int) in the type q is not applicable for the arguments ()
    //上面这一行是错误提示，是什么意思啊？
	public static void main(String agrs[]) {
		q w=new q();
		w.showAge();
		w.getAge(9);
		q e=new q();
		e.getAge(10);
		e.showAge();
	}
}

Answer 1

参数不能用，你两个方法代码写反了

package T1;

public class Q {
	int age;

	int getAge() {
		return age;
	}

	void setAge(int age) {
		this.age = age;
	}

	void showAge() {
		System.out.println("年龄是:" + getAge());
	}
	public static void main(String agrs[]) {
		Q q = new Q();
		q.setAge(9);
		q.showAge();
		Q e = new Q();
		e.setAge(10);
		e.showAge();
	}
}