Look Ma, No Layouot Manager, Java Swing Programming with multi-line JTextArea and TextArea

1. T0
Toward a class to handle putting a scrolling body of text
In a Java Swing Application
Part of the Series:
Look Ma: No LayoutManager
TP.pptx
TP.java
TP

3. JTextArea TextArea

4. TP.pptx
TP.java
TP
1. Declaration of pointer to the Control
ControlType V
JTextArea RT; TextArea TA;
V = new ControlType()
TA = new TextArea
(B.toString(),
NORows,maxLL);
RT = new JTextArea (NORows,maxLL);

5. static String [] JT = new
String [] {
"ONE True --- ONE ONE
----- ONE True ----- ONE
True ---- ONE True",
"TWO True --- TWO TWO
----- TWO True ----- TWO
True ---- TWO True",
"THREE True --- THREE

6. THREE ----- THREE True ----
- THREE True ---- THREE
True",
"FOUR True --- FOUR
FOUR ----- FOUR True -----
FOUR True ---- FOUR True"
};

8. StringBuffer B;
B = new StringBuffer();
for (i=0;i<JT.length;i++){
B.append(JT[i]);
B.append ('n');
}
RT.setText(B.toString());
TA = new TextArea
(B.toString(),NORows,maxLL);

9. StringBuffer B;
B = new StringBuffer();
for (i=0;i<JT.length;i++){
B.append(JT[i]);
B.append ('n');
}

10. StringBuffer B;
B = new StringBuffer();
for (i=0;i<JT.length;i++){
B.append(JT[i]);
B.append ('n');
}

11. StrStringBuffer B;
B = new StringBuffer();
for (i=0;i<JT.length;i++){
B.append(JT[i]);
if (i!=JT.length-1){B.append ('n');}
}

12. String B;
B = new String();
for (i=0;i<JT.length;i++){
B = B + (JT[i]) + ‘n’;
}
O ( JT.length) 2

13. RT = new JTextArea (NORows,maxLL);
RT.setText(B.toString());

14. A B C
D E
G H I F
J L K M
P N Q O
P N
X
JT
maxLL
NOROWS 5
5

15. static Font SF;
static FontMetrics SFM;
static Graphics C;
SF = new Font ("Arial",Font.BOLD,12);
SFM = f.getFontMetrics(SF);

16. static Font SF;
static FontMetrics SFM;
static Graphics C;
SF = new Font ("Arial",Font.BOLD,12);
SFM = f.getFontMetrics(SF);
L = JT[i];
Rectangle2D WR = SFM.getStringBounds (L,C);
W= (int)WR.getWidth(););
if (W>maxLW) maxLW = W;

17. A B C
D E
G H I F
J L K M
P N Q O
P N
X
JT
int NORows = JT.length;
int height = SFM.getHeight();
int H = NORows*height;
That is six lines * the number of pixels in

18. V . setSize( width , height )
TA . Setsize ( 100 ,50 );
Step Three

19. V . setSize( width , height )
TA . Setsize ( 100 ,50 );
Step Three

20. V . setSize( width , height )
TA . Setsize ( 100 ,50 );
Step Three

21. Step Four
V . setLocation( x-pos , y-pos )
TA . setLocation( 50 ,200 );

22. Step Five
Frame.getContentPane().Add( V )
Frame.getContentPane().Add( TA )

23. Back to our Java Swing JTextArea
JScrollPane J;
J = new JScrollPane(RT);

24. J = new JScrollPane();
J.setSize(100,50);
J.setLocation(50,50);
JViewport V;
V =
(JViewport)J.getViewport();
V.add(RT);

25. V . setSize( width , height )
J . Setsize ( 100 ,50 );
Step Three

26. Step Four
V . setLocation( x-pos , y-pos )
J . setLocation( 50 ,50 );

27. RT.setForeground(Color.black);
RT.setFont(SF);

28. Step Five
Frame.getContentPane().Add( V )
Frame.getContentPane().Add( J )

29. Step Five
Frame.getContentPane().Add( V )
Frame.getContentPane().Add( J )

30. Step Five
Frame.getContentPane().Add( V )
Frame.getContentPane().Add( J )
T1.pptx
T1.java
T1