Java Chapter 2 sample code and Chapter 2 Sample Code

Java Chapter 2 sample code and Chapter 2 Sample Code

Import java. util. collections;

/**
*
* @ Author asus Chapter 1 sample code 1 full-country group 2017.4.9
*
*/
Public class Registter {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
Wrote input = new partition (System. in );
String uname, pwd;
System. out. println ("Enter the User name :");
Uname = input. next ();
System. out. println ("enter the password :");
Pwd = input. next ();
If (pwd. length ()> = 6) {// determine the password length
System. out. println ("registration successful! ");
} Else {
System. out. println ("the password length cannot be less than 6 characters! ");
}
}

}

/**
*
* @ Author asus Chapter 1 sample code 2 full-country group 2017.4.9
*
*/
Import java. util. collections;

Public class Login {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
Wrote input = new partition (System. in );
String uname, pwd;
System. out. println ("Enter the User name :");
Uname = input. next ();
System. out. println ("enter the password :");
Pwd = input. next ();
If (uname. equals ("TOM") & pwd. equals ("1234567 ")){
System. out. println ("Logon successful! ");
} Else {
System. out. println ("the user name or password does not match. Please log on again! ");
}
}
}

/**
*
* @ Author asus Chapter 3 sample code 3 full-country group 15th
*
*/
Public class Difference {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
String str1 = new String ("I love my motherland ");
String str2 = new String ("I love my motherland ");
If (str1.equals (str2 )){
System. out. println ("the two strings have the same value. ");
} Else {
System. out. println ("two strings have different values. ");
}
If (str1 = str2 ){
System. out. println ("the two strings have the same value. ");
} Else {
System. out. println ("two strings have different values. ");
}
}
}

Import java. util. collections;

/**
*
* @ Author asus Chapter 4 sample code 4 7.4.9
*
*/
Public class Login4 {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
Wrote input = new partition (System. in );
String uname, pwd;
System. out. println ("Enter the User name :");
Uname = input. next ();
System. out. println ("enter the password :");
Pwd = input. next ();
If (uname. inclusignorecase ("TOM") & pwd. inclusignorecase ("1234567 ")){
System. out. println ("Logon successful! ");
} Else {
System. out. println ("the user name or password does not match. Please log on again! ");
}
}
}

/**
*
* @ Author asus Chapter 5 sample code 5 full-country group 2017.4.9
*
*/
Public class PrintScore {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
Int sqlScore = 80; // SQL score
Int primary core = 90; // java score
Double htmlScore = 86.7; // HTML score
String scoreSheet = "SQL:" + sqlScore + "\ t" + "java" + javaScore + "\ t" + "HTML" + htmlScore; // transcript
// Print the transcript
System. out. println ("*********** transcript **********");
System. out. println (scoreSheet );
}

}

Import java. util. collections;

/**
*
* @ Author asus Chapter 6 sample code 6 7.4.9
*
*/
Public class Verify {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
// Declare Variables
Boolean fileexpect = false; // identifies whether the file name is correct
Boolean emaiLCorrect = false; // identifies whether email is correct
System. out. println ("--- Welcome To The Job submission System ---");
Wrote input = new partition (System. in );
System. out. println ("Enter the java file name :");
String fileName = input. next ();
System. out. println ("Enter your email address :");
String email = input. next ();
// Check the java file name
Int index = fileName. lastIndexOf ("."); // The location "."
If (index! =-1 & index! = 0 & fileName. substring (index + 1, fileName. length (). equals ("java ")){
Fileexpect = true;
} Else {
System. out. println ("the file name is invalid. ");
}
// Check your email format
If (email. indexOf ('@')! =-1 & email. indexOf ('.')> email. indexOf ('@')){
Fileexpect = true;

} Else {
System. out. println ("E-mail is invalid. ");
}
// Output the detection result
If (fileeffecct & fileeffecct ){
System. out. println ("the job is submitted successfully! ");
} Else {
System. out. println ("Job submission failed! ");
}
}

/**
*
* @ Author asus Chapter 6 sample code 7 full-country group 2017.4.9
*
*/
Public class Lyric {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
String words = "Long pavilion outside the ancient road side grass green sky evening wind help Liu flute residual sunset Mountain ";
String [] printword = new String [100]; // defines the number of recipients.
System. out. println ("*** original lyrics format *** \ n" + words );
System. out. println ("\ n *** format of the split lyrics ***");
Printword = words. split (""); // split by Space
For (int I = 0; I <printword. length; I ++ ){
System. out. println (printword [I]); // print the output
}
}

}

/**
*
* @ Author asus Chapter 8 sample code 8 7.4.9
*
*/
Public class sbAppend {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
StringBuffer sb = new StringBuffer ("No regrets ");
Int num = 110;
// Append the string after the string
StringBuffer sb1 = sb. append ("My heart is always ");
System. out. println (sb1 );
// Append a character after the string
StringBuffer sb2 = sb1.append ('Ah ');
System. out. println (sb2 );
// Append an integer to the end of the string
StringBuffer sb3 = sb2.append (num );
System. out. println (sb3 );
}

}

Import java. util. collections;

/**
*
* @ Author asus Chapter 1 sample code 9 Full-country group 2017.4.9
*
*/
Public class TestTnsert {

/**
* @ Param args
*/
Public static void main (String [] args ){
// TODO Auto-generated method stub
Wrote input = new partition (System. in );
// Receives strings, which are stored in StringBuffer objects.
System. out. println ("enter a string of numbers :");
String nums = input. next ();
StringBuffer str = new StringBuffer (nums );
// Add a comma every three digits from the back to the back
For (int I = str. length ()-3; I> 0; I = I-3 ){
Str. insert (I ,',');
}
System. out. println (str );
}

}