The implementation of abstract methods in the Java applet---interface (solves the problem that the Java language cannot inherit more)

Public interface Sing {
public static final String eyecolor= "Black";
public void sleep ();
public void Sing ();
}

Public interface Print {
public static final String sex= "woman";
public void print ();
public void eat ();
}

public class Student implements sing{
String name;
Public Student (String name) {
This.name=name;
}
Public String GetName () {
return name;
}
public void sleep () {
System.out.println ("Student is Sleeping");
}
public void Sing () {
System.out.println ("Student is SingSong");
}
public void All () {
System.out.println ("The name" +name+ "student is a person who likes singing");
}
}

public class teacher implements sing,print { 
 int age; 
 Public teacher (int age)  {
 This.age=age; 
} 
 Public int getage () {
 return age; 
} 
 Public void print ()  {
 System.out.println ("Teacher is print"); 
} 
 Public void eat ()  {
 System.out.println ("teacher is eating"); 
} 
 Public void sleep ()  {
 System.out.println ("teacher is sleeping"); 
} 
 public void sing ()  {
 System.out.println ("Teacher is singsong"); 
} 
 Public void info () {
 System.out.println ("This" +age+ "old teacher can sing and draw"); 
} 
} 
 
 

public class Test {
public static void Main (string[] args) {
Student s1=new Student ("liqing");
S1.sleep ();
S1.sing ();
S1.all ();
Sing t1=new Teacher (25);
T1.sing ();
T1.sleep ();
Print p1= (print) T1; (Object type Cast)
P1.print ();
P1.eat ();
Teacher t2= (Teacher) T1;
T2.info ();
}
}

The implementation of abstract methods in the Java applet---interface (solves the problem that the Java language cannot inherit more)