eclipse上显示白色的叉叉

package com.imooc.office;

public class Employee {

// 成员属性有：员工姓名，工号，年龄，性别，所属部门，职务信息

private String strName;

private String strNo;

private String strAge;

private Department dep;

private Job job;

// 无参构造方法

public Employee() {

}

// 带五参构造方法，给员工姓名，工号，年龄，性别，所属部门，职务信息赋值

public Employee(String strName, String strNo, String strAge, Department dep, Job job) {

this.setStrName(strName);

this.setStrNo(strNo);

this.setStrAge(strAge);//The method setStrAge(String) is undefined for the type Employee（为什么会提示这个）

this.setDep(dep);

this.setJob(job);

}

// get和set方法

public String getStrName() {

return strName;

}

public void setStrName(String strName) {

this.strName = strName;

}

public String getStrNo() {

return strNo;

}

public void setStrNo(String strNo) {

this.strNo = strNo;

}

public String getStrAge() {

return strAge;

}

public void setStrAge(String strAge) {

this.strAge = strAge;

}

public Department getDep() {

return dep;

}

public void setDep(Department dep) {

this.dep = dep;

}

public Job getJob() {

return job;

}

public void setJob(Job job) {

this.job = job;

}

}