Question

Java类的继承

//C1.java
class PersonA
{
private String name;
public void setName(String newName)
{
name=newName;
}
public String getName()
{
return name;
}
}
class StudentA extends PersonA
{
private String department;
public void setDepartment(String newDepartment)
{
department=newDepartment;
}
public String getDepartment()
{
return department;
}
}
class C1
{
public static void main(String args[])
{
StudentA s1=new StudentA();
s1.setName("张三");
s1.setDepartment("计算机系");
System.out.println("你好，我是"+s1.setName);
System.out.println("我是"+s1.setDepartment+"的学生");
}
}

Answer 1

//C1.java
class PersonA {
private String name;

public void setName(String newName) {
name = newName;
}

public String getName() {
return name;
}
}

class StudentA extends PersonA {
private String department;

public void setDepartment(String newDepartment) {
department = newDepartment;
}

public String getDepartment() {
return department;
}
}

class C1 {
public static void main(String args[]) {
StudentA s1 = new StudentA();
s1.setName("张三");
s1.setDepartment("计算机系");
System.out.println("你好，我是" + s1.getName());//你这里写错了不是 setName
System.out.println("我是" + s1.getDepartment() + "的学生");//不是 setDepartment
}
}