Assignment No: 5

Assignment No: 5 

Set A:

a)Write a java program that works as a simple calculator. Use a grid layout to arrange buttons for the digits and for the +, -, *, /, % operations. Add a text filed to display the result.

CODE:

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1. import java.awt.*;
2. import java.awt.event.*;
3. import javax.swing.*;
4. 
   
5. public class calc  extends JFrame implements ActionListener
6. {
7. String msg=" ";
8. int v1,v2,result;
9. JTextField t;
10. JButton b[]=new JButton[10];
11. JButton add,sub,mul,div,clear,equals;
12. char choice;
13. JPanel p,p1;
14. calc()
15. {
16. setLayout(new BorderLayout());
17. p =new JPanel();
18. t=new JTextField(20);
19. p.add(t);
21. p1=new JPanel();
22. p1.setLayout(new GridLayout(5,4));
23. for(int i=0;i<10;i++)
24. {
25. b[i]=new JButton(""+i);
26. }
27. equals=new JButton("=");
28. add=new JButton("+");
29. sub=new JButton("-");
30. mul=new JButton("*");
31. div=new JButton("/");
32. clear=new JButton("C");
34. for(int i=0;i<10;i++)
35. {
36. p1.add(b[i]);
37. }
39. p1.add(equals);
40. p1.add(add);
41. p1.add(sub);
42. p1.add(mul);
43. p1.add(div);
44. p1.add(clear);
46. for(int i=0;i<10;i++)
47. {
48. b[i].addActionListener(this);
49. }
50. add.addActionListener(this);
51. sub.addActionListener(this);
52. mul.addActionListener(this);
53. div.addActionListener(this);
54. clear.addActionListener(this);
55. equals.addActionListener(this);
57. add(p,BorderLayout.NORTH);
58. add(p1);
59. setVisible(true);
60. setSize(500,500);
61. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
63. }
65. public void actionPerformed(ActionEvent ae)
66. {
67. String str = ae.getActionCommand();
68. char ch = str.charAt(0);
69. if ( Character.isDigit(ch))
70. t.setText(t.getText()+str);
71. else if(str.equals("+"))
72. {
73. v1=Integer.parseInt(t.getText());
74. choice='+';
75. t.setText("");
76. }
77. else if(str.equals("-"))
78. {
79. v1=Integer.parseInt(t.getText());
80. choice='-';
81. t.setText("");
82. }
83. else if(str.equals("*"))
84. {
85. v1=Integer.parseInt(t.getText());
86. choice='*';
87. t.setText("");
88. }
89. else if(str.equals("/"))
90. {
91. v1=Integer.parseInt(t.getText());
92. choice='/';
93. t.setText("");
94. }
96. if(str.equals("="))
97. {
98. v2=Integer.parseInt(t.getText());
99. if(choice=='+')
100. result=v1+v2;
101. else if(choice=='-')
102. result=v1-v2;
103. else if(choice=='*')
104. result=v1*v2;
105. else if(choice=='/')
106. result=v1/v2;
108. t.setText(""+result);
109. }
110. if(str.equals("C"))
111. {
112. t.setText("");
113. }
114. }
115. public static void main(String a[])
116. {
117. calc ob = new calc();
118. }
119. }

b)Design a screen to handle the Mouse Event such as MOUSE_MOVED and MOUSE_CLICK and display the position of the Mouse_Click in a TextField.

CODE:

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1. import java.awt.event.*;
2. import java.awt.*;
3. import javax.swing.*;
4. public class MouseEvents extends JFrame implements MouseListener,MouseMotionListener
5. {
6.    JTextField txt1;
7.    MouseEvents()
8.    {
9.       setSize(500,500);
10.       setLayout(new FlowLayout());
11.       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
12.       txt1=new JTextField(30);
13.       add(txt1);
14.       addMouseListener(this);
15.       addMouseMotionListener(this);
16.       setVisible(true);
17.    }
18. 
    
19.    @Override
20.    public void mouseDragged(MouseEvent e)
21.    {}
22. 
    
23.    @Override
24.    public void mouseMoved(MouseEvent e)
25.    {
26.       txt1.setText("Mouse Moved"+e.getX()+","+e.getY());
27.    }
28. 
    
29.    @Override
30.    public void mouseClicked(MouseEvent e)
31.    {
32.       txt1.setText("Mouse Clicked"+e.getX()+","+e.getY());
33.    }
34.    
35.    @Override
36.    public void mousePressed(MouseEvent e)
37.    {}
38. 
    
39.    @Override
40.    public void mouseReleased(MouseEvent e)
41.    {}
42. 
    
43.    @Override
44.    public void mouseEntered(MouseEvent e)
45.    {}
46. 
    
47.    @Override
48.    public void mouseExited(MouseEvent e)
49.    {}
50. 
    
51.    public static void main(String[]args)
52.    {
53.       MouseEvents mouseEvents = new MouseEvents();
54.    }
55. }

Set B:

a) Create the following GUI screen using appropriate layout managers. Accept the name, class,

hobbies of the user and apply the changes and the selected options in a text box.

CODE:

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1. import javax.swing.*;
2. import java.awt.*;
3. import java.awt.event.*;
4. 
   
5. class form extends JFrame implements ActionListener
6. {
7.  JLabel l1,l2,l3;
8.  JButton b;
9.  JRadioButton r1,r2,r3;
10.  JCheckBox c1,c2,c3;
11.  JTextField t1,t2;
12.  ButtonGroup b1;
13.  JPanel p1,p2;
14.  String s;
15.  static int cnt;
16.  private StringBuffer s1=new StringBuffer();
17.  
18.  form()
19.  {
20.   b1=new ButtonGroup();
21.         p1=new JPanel();
22.         p2=new JPanel();
23.         b=new JButton("clear");
24.         b.addActionListener(this);
25.   
26.   r1=new JRadioButton("FY");
27.    r2=new JRadioButton("SY");
28.    r3=new JRadioButton("TY");
29.    
30.    b1.add(r1);
31.    b1.add(r2);
32.    b1.add(r3);
33.    
34.    r1.addActionListener(this);
35.    r2.addActionListener(this);
36.    r3.addActionListener(this);
37.     
38.    c1=new JCheckBox("Music");
39.    c2=new JCheckBox("Dance");
40.    c3=new JCheckBox("Sports");
41.    
42.     c1.addActionListener(this);
43.     c2.addActionListener(this);
44.     c3.addActionListener(this);
45.     
46.     l1=new JLabel("Your Name");
47.     l2=new JLabel("Your Class");
48.     l3=new JLabel("Your Hobbies");
49.     
50.     t1=new JTextField(20);
51.     t2=new JTextField(30);
52.    
53.    p1.setLayout(new GridLayout(5,2));
54.    p1.add(l1); p1.add(t1);
55.    p1.add(l2); p1.add(l3);
56.    p1.add(r1); p1.add(c1);
57.    p1.add(r2); p1.add(c2);
58.    p1.add(r3); p1.add(c3);
59.     
60.     p2.setLayout(new FlowLayout());
61.     p2.add(b);
62.     p2.add(t2);
63.     
64.     setLayout(new BorderLayout());
65.     add(p1,BorderLayout.NORTH);
66.     add(p2,BorderLayout.CENTER);
67.     setSize(600,300);
68.     setVisible(true);
69.     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
70.    }
71.    
72.    public void actionPerformed(ActionEvent e)
73.    {
74.      if(e.getSource()==r1)
75.      {
76.        cnt++;
77.        if(cnt==1)
78.         {
79.          s=t1.getText();
80.          s1.append("Name =");
81.          s1.append(s);
82.         }
83.         s1.append("Class=FY");
84.      }
85.   
86.     else if(e.getSource()==r2)
87.     {
88.      cnt++;
89.      if(cnt==1)
90.       {
91.         String s= t1.getText();
92.          s1.append("Name =");
93.          s1.append(s);    
94.         }
95.      s1.append("Class=SY");     
96.     } 
97.      else if(e.getSource()==r3)
98.     {
99.      cnt++;
100.      if(cnt==1)
101.       {
102.         String s= t1.getText();
103.          s1.append("Name =");
104.          s1.append(s);    
105.         }
106.      s1.append("Class=TY");   
107.    }
108.    
109.    else if(e.getSource()==c1)
110.     {
111.      s1.append("Hobbies=Music");   
112.     }
113.      
114.    else if(e.getSource()==c2)
115.     {
116.      s1.append("Hobbies=Dance");   
117.     }
118.     
119.     else if(e.getSource()==c3)
120.     {
121.      s1.append("Hobbies=Sports");   
122.     }
123.     
124.     t2.setText(new String(s1));
125.     if(e.getSource()==b)
126.      {
127.       t2.setText(" ");
128.       t1.setText(" ");
129.     }
130.  }
131.  public static void main(String arg[])
132.  {
133.   form f=new form();
134.  }
135. } 

       

   

b) Write a java program to design a screen using Awt that will take a username and password. If the username and password are not the same, raise an Exception with the appropriate message. User can have 3 login chance only. Use clear button to clear the TextFields.

CODE:

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