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System.out.println("Hello World"); }

}

2.

// TODO Auto-generated method stub double x1,y1,x2,y2,d,d2;

Scanner scanner = new Scanner (System.in); System.out.println ("Nhap toa do diem thu nhat"); x1= scanner.nextDouble();

System.out.print("Khoang cach giua 2 diem la: " + Math.ceil(d*100.0)/100.0);

}

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3.

package b3;

// TODO Auto-generated method stub double x1,y1,x2,y2,r1,r2,d,d2;

Scanner scanner = new Scanner (System.in);

System.out.println ("Nhap toa do tam duong tron 1:"); x1= scanner.nextDouble();

<b>Assignment Tu n 2+3 </b>ầ

<b>Bài làm </b>

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publicclass Rectangle { double width; double height; public Rectangle() { }

public Rectangle(double width, double height) { this.width = width;

this.height = height; }

public double getWidth() { return width; }

public void setWidth(double width) { this.width = width;

}

public double getHeight() { return height; }

public void setHeight(double height) { this.height = height;

}

public double getArea() { return getHeight()*getWidth(); }

public double getPerimeter() { return getHeight() + getWidth(); }

}

int channel; int volumeLevel; boolean on;

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public void turnOn() { on = true;

System.out.println("Turn on this TV"); }

public void turnOff() { on = false;

System.out.println("Turn off this TV"); }

public void setChannel (int newChanel) { this.channel = newChanel;

System.out.println("Set "+ this.channel +" for this TV"); }

public void setVolume (int newVolumeLevel) { this.volumeLevel = newVolumeLevel;

System.out.println("Set "+ this.volumeLevel+" for this TV"); }

public void channelUp() { this.channel += ; 1

System.out.println("Increases the channel number by 1");

}

public void channelDown() { this.channel -= ; 1

System.out.println("Decreases the channel by 1"); }

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public static void main(String[] args) { // TODO Auto-generated method stub

}

}

4.

// TODO Auto-generated method stub

System.out.println("---Ket qua bai 4:---"); Random random = new Random(1000);

int count = ; 0

for int( i = ; i < 0 50; i++) {

/* After 10 numbers go to the next line */ if(count == 10) {

System.out.print("\n"); count = ; 0

}

System.out.print(random.nextInt(100) + " "); count++;

}

System.out.println(" "); }

5.

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public Date getStartTime() { return startTime; }

public void setStartTime(Date startTime) { this.startTime = startTime;

}

public Date getEndTime() { return endTime; }

public void setEndTime(Date endTime) { this.endTime = endTime;

}

public stopWatch() { startTime = new Date(); }

public void start() { startTime = new Date(); }

public void stop() { endTime = new Date(); }

public double getElapsedTime() {

return endTime.getTime() - startTime.getTime(); }

// TODO Auto-generated method stub /*---1. Ket qua bai 1---*/

System.out.println("---Ket qua bai --");

Rectangle rectangle = new Rectangle(); rectangle.setHeight( ); 2

System.out.println("Height use setHeight function: " + rectangle.getHeight());

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System.out.println("Width after use setWidth function: " + rectangle.getWidth());

rectangle = new Rectangle(4 5, );

System.out.println("Height use contrusctor have argument function: "+ rectangle.getHeight() );

System.out.println("Width use contrusctor have argument function: "+ rectangle.getWidth() );

System.out.println("The area of rectangle use contrusctor have argument function: " + rectangle.getArea());

System.out.println("The Perimeter of rectangle use contrusctor have argument function: " + rectangle.getPerimeter());

/*---2.Ket qua bai 2---*/

System.out.println("---Ket qua bai --");

TV tv = new TV(); tv.turnOn();

tv.turnOff(); tv.setChannel( ); 1 tv.setVolume( ); 2 tv.channelUp(); tv.channelDown(); tv.volumeUp(); tv.volumeDown();

/*---3.Ket qua bai 3---*/

System.out.println("---Ket qua bai -");

Date date = new Date((long) pow(10 2, ));

date = new Date((long) pow(10 4,));

System.out.println("date after 10000ms: " + date.toString());

date = new Date((long) pow(10 5,));

System.out.println("date after 100000ms: " + date.toString());

date = new Date((long) pow(10 6,));

System.out.println("date after 1000000ms: " + date.toString());

date = new Date((long) pow(10 7,));

System.out.println("date after 10000000ms: " + date.toString());

date = new Date((long) pow(10 8,));

System.out.println("date after 100000000ms: " + date.toString());

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System.out.println("date after 1000000000ms: " + date.toString());

date = new Date((long) pow(10 10, ));

System.out.println("date after 10000000000ms: " + date.toString()); /*---3.Ket qua bai 4---*/

System.out.println("---Ket qua bai -");

Random random = new Random(1000); int count = ; 0

for int( i = ; i < 0 50; i++) {

/* After 10 numbers go to the next line */ if(count == 10) {

System.out.print("\n"); count = ; 0

}

System.out.print(random.nextInt(100) + " "); count++;

}

System.out.println(" ");

/*---5. Ket qua bai 5---*/

System.out.println("---Ket qua bai -");

stopWatch stopwatch = new stopWatch();

System.out.println("Start time after constructor: " + stopwatch.getStartTime());

stopwatch.setStartTime(new Date(1000));

System.out.println("Start time after use setStartTime function: "+ stopwatch.getStartTime());

stopwatch.setEndTime(new Date(100000));

System.out.println("End time after use setEndTime function: "+ stopwatch.getEndTime());

System.out.println("Time elapsed: " + stopwatch.getElapsedTime()); }

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public int SLOW = ; 1 public int MEDIUM = ; 2 public int FAST = ; 3

String color; Fan(){

speed = SLOW; on = false; radius = ; 5 color = "blue"; }

return speed; }

this.speed = speed; }

return on; }

this.on = on;

}public double getRadius() { return radius;

}

this.radius = radius; }public String getColor() {

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public void setColor(String color) { this.color = color;

}

return ( "Fan is "+ this.color + " and the radius of the fan is " + this.radius);

} }

2.

public MyInteger(int value1) { this.value= value1; }

return value; }

return ((value % ) == ); 2 0 }

return ((value % ) == ); 2 1 }

if (value == || value == ) { 1 2 return true;

} else {

for (int i = 2; i < value; i++) { if (value % i == ) 0 return false; }

}

return true; }

return myInt.isEven(); }

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return myInt.isOdd(); }

return myInt.isPrime(); }

if (this.value == value2) return true; return false;

}

if (this.value == value3.value) return true; return false;

}

String newString = String.valueOf(arrayChar); int newValue = Integer.valueOf(newString); return newValue;

}

int newValue = Integer.valueOf(newString); return newValue;

} }

3.

private int id;

privatedouble balance; double annualInterestRate; private Date dateCreated;

public Account() { id = ; 0 balance = ; 0

annualInterestRate = ; 0

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public Account(int id, double balance) { this.id = id;

this.balance = balance; dateCreated = new Date(); }

public int getId() { return id; }

public void setId(int id) { this.id = id;

}

public double getBalance() { return balance; }

public void setBalance(double balance) { this.balance = balance;

}

public double getAnnualInterestRate() { return annualInterestRate; }

public void setAnnualInterestRate(double annualInterestRate) { this.annualInterestRate = annualInterestRate;

}

public Date getDateCreated() { return dateCreated; }

public double getMonthlyInterestRate() { return annualInterestRate / 12; }

public double getMonthlyInterest() { return balance * getAnnualInterestRate(); }

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Scanner scanner = new Scanner(System.in); double withdrawMoney = scanner.nextDouble(); balance -= withdrawMoney;

}

public void deposit() {

System.out.print("Enter an amount to deposit: "); Scanner scanner = new Scanner(System.in); double depositMoney = scanner.nextDouble(); balance += depositMoney;

} }

4.

System.out.println("---Ket qua bai 4---"); Account[] accountList = new Account[10]; for int( i = ; i < accountList.length; i++) { 0 accountList[i] = new Account(i, 1000000); }

while true( ) {

System.out.print("Nhap id: "); int id = scanner.nextInt(); if(id < || id > ) { 0 9

System.out.println("The ID is not correct. Please enter ID again!");

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accountList[id].getBalance()); break; case :

accountList[id].withdraw(); break;

case :

accountList[id].deposit(); break;

case :

check = false; break; default:

System.out.println("The choice is not in menu. Please enter the choice again!");

break; }

} } } }

// TODO Auto-generated method stub /*---Bai1---*/

System.out.println("---Ket qua bai 1---"); Fan fan1 = new Fan();

Fan fan2 = new Fan(); fan1.setSpeed( ); 3 fan1.setRadius(10); fan1.setColor("yellow"); fan1.setOn(true); fan2.setSpeed( ); 2 fan2.setColor("blue"); fan2.setRadius( ); 5 fan2.setOn(false);

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System.out.println("Gia tri 1 = "+ value1.getValue()); System.out.println("Gia tri 2 = "+ value2.getValue()); System.out.println("Gia tri 3 = "+ value3.getValue());

System.out.println("Gia tri 1 la so chan: " + value1.isEven()); System.out.println("Gia tri 1 la so le: " + value1.isOdd()); System.out.println("Gia tri 1 la so nguyen to: " + value1.isPrime());

System.out.println("Gia tri 2 la so chan: " + value2.isEven()); System.out.println("Gia tri 2 la so le: " + value2.isOdd()); System.out.println("Gia tri 2 la so nguyen to: " + value2.isPrime());

System.out.println("Gia tri 3 la so chan: " + value3.isEven()); System.out.println("Gia tri 3 la so le: " + value3.isOdd()); System.out.println("Gia tri 3 la so nguyen to: " + value3.isPrime());

MyInteger newMyInteger = new MyInteger( ); 9 System.out.println("newMyInteger chan: " + newMyInteger.isEven(newMyInteger));

System.out.println("newMyIntege le: " + newMyInteger.isOdd(newMyInteger));

System.out.println("newMyInteger la so nguyen to: " + newMyInteger.isPrime(newMyInteger));

System.out.print("Nhap so can kiem tra: "); Scanner scanner = new Scanner(System.in); int newNumber = scanner.nextInt();

System.out.println(newNumber + "= gia tri 1: " + value1.equals(newNumber));

System.out.println("Gia tri newMyInteger: " + newMyInteger.getValue() + " bang gia tri value1: " + value1.equals(newMyInteger));

char[] charArray = {'2', '0', '2' '2', }; int convertNum = value.parseInt(charArray);

System.out.println("Mang chuyen thanh so: " + convertNum);

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account.withdraw();

account.setAnnualInterestRate(4.5/100);

NumberFormat currentLocale = NumberFormat.getInstance(); System.out.println("Balance: " +

currentLocale.format(account.getBalance())); System.out.println("Monthly interest: " + currentLocale.format(account.getMonthlyInterest()));

System.out.println("Date created: " + account.getDateCreated());

/*---Bai4---*/

System.out.println("---Ket qua bai 4---"); Account[] accountList = new Account[10]; for int( i = ; i < accountList.length; i++) { 0 accountList[i] = new Account(i, 1000000); }

while true( ) {

System.out.print("Nhap id: "); int id = scanner.nextInt(); if(id < || id > ) { 0 9

System.out.println("The ID is not correct. Please enter ID again!");

case :

System.out.println("The balance is " + accountList[id].getBalance());

break;

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break; case :

accountList[id].deposit(); break;

case :

check = false; break; default:

System.out.println("The choice is not in menu. Please enter the choice again!");

break; }

} } } }

}

this.color = color; this.filled = filled;

this.dateCreated = new Date(); }

return color; }

this.color = color; }

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}

this.filled = filled; }

return dateCreated; }

return ("Color: "+ this.color + " IsFilled: "+ this.filled + " Date:" + this.dateCreated );

} }

double radius; public Circle2() { }

public Circle2(double radius) { this.radius = radius; }

public Circle2(String color, boolean filled, double radius) { super();

this.radius = radius; }

public double getRadius() { return radius; }

public void setRadius(double radius) { this.radius = radius;

}

public double getArea(){

return Math.PI * Math.pow(this.radius,2); }

public double getPerimeter(){ return * Math.PI * this.radius;

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public double getDiameter(){ return * this.radius; }

public String printCircle(){

return super.toString() + " Radius:"+this.radius; }

}

2.

}

emailAddress) {

this.name = name; this.address = address; this.phoneNumber = phoneNumber; this.emailAddress = emailAddress; }

this.name = name; }

return name; }

this.address = address; }

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return sum; }

public String toString () {

return ("Color: "+ this.color + " ,IsFilled: "+ this.filled + " ,Date:" + this.dateCreated );

} }

public Rectangle(double width, double height) { this.width = width;

this.height = height; }

public Rectangle(double width, double height, String color, boolean

filled) { super(); this.width = width; this.height = height; }

public double getWidth() { return width; }

public void setWidth(doublewidth) { this.width = width;

}

public double getHeight() { return height; }

public void setHeight(doubleheight) { this.height = height;

} @Override

public double getArea() { return width*height; }

public double getPerimeter() { return 2*(width height + ); }

public void printRectangle() {

System.out.println(super.toString() + " - Width: " + width + " - Height: " + height + " - Area: " + getArea() +

" - Perimeter: " + getPerimeter()); }

public String toString() {

</div>