~~~ package studentM; //学生类 class Student { private int on; private String name; private int age; private int java; private int c_shar; private int html; private int sql; private int sum; private int avg; public int getOn() { return on; } public void setOn(int on) { this.on = on; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public int getJava() { return java; } public void setJava(int java) { this.java = java; } public int getC_shar() { return c_shar; } public void setC_shar(int c_shar) { this.c_shar = c_shar; } public int getHtml() { return html; } public void setHtml(int html) { this.html = html; } public int getSql() { return sql; } public void setSql(int sql) { this.sql = sql; } public int getSum() { return sum; } public void setSum() { this.sum = this.java+this.html+this.c_shar+this.sql; } public int getAvg() { return avg; } public void setAvg() { this.avg = this.sum/4; } @Override public String toString() { String msg="\t" + this.on + "\t" + this.name + "\t" + this.age + "\t" + this.java + "\t" + this.c_shar + "\t" + this.html + "\t" + this.sql + "\t" + this.sum + "\t" + this.avg; return msg; } } ~~~