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Teacher.java
public class Teacher { //public主类,主类名需要和文件名相同 //成员变量 private String name; private String password; //构造方法,至少一个,不写默认自动生成一个无参数构造函数,不然的话不能使用new public Teacher(String n,String p) { name=n; password=p; } //成员方法 public void introduce() { System.out.println("姓名:"+name+"密码:"+password); } public static void main(String[] arg) { //主类和main方法一起使用 Teacher teacher1=new Teacher("admin","1121212"); teacher1.introduce(); }}
在相同的目录下新建一个TestTeacher类
Teacher.javapublic class Teacher { //成员变量 private String name; private String password; //构造方法 public Teacher(String n,String p) { name=n; password=p; } //成员方法 public void introduce() { System.out.println("姓名:"+name+"密码:"+password); }}
TestTeacher.java
public class TestTeacher { public static void main(String[] args) { // TODO Auto-generated method stub Teacher t1=new Teacher("12","2424");//新建对象,直接赋值 t1.introduce(); }}
TestTeacher.java
public class TestTeacher { //主类 public static void main(String[] args) { // TODO Auto-generated method stub Teacher t1=new Teacher("12","2424"); t1.introduce(); }}//提示错误,类已经定义,在Teacher.java文件里面定义过一次,删除Teacher.java文件class Teacher { //成员变量 private String name; private String password; //构造方法 public Teacher(String n,String p) { name=n; password=p; } //成员方法 public void introduce() { System.out.println("姓名:"+name+"密码:"+password); }}
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