报错：Compiler did not create the expected binary

Question

class Student{
    private String sid,name,major;
    private int age;
    public Student() {
    }
    public Student(String sid, String name, int age,String major) {
        this.sid = sid;
        this.name = name;
        this.age = age;
        this.major = major;
    }
    public String getSid() {
        return sid;
    }
    public void setSid(String sid) {
        this.sid = sid;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getmajor() {
        return major;
    }
    public void setmajor(String major) {
        this.major = major;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public void print(){
        System.out.println("学号："+sid+"，姓名："+name+"，年龄："+age+"，专业："+major);
    }
}

报错：Compiler did not create the expected binary
如何修改？

Answer 1

看看是不是之前的程序在运行后没有正确关闭，导致文件被占用，无法写入
建议重启下电脑，再编译。