Check if the content of text area is empty (java)
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0
down vote
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I am trying to read data from a textarea (JTextArea) and store the contents into a table(MySQL). I don't want the INSERT query to execute if the textarea is empty or has a newline without any text. I tried the following code but it does not work. Could someone help me out. Thanks.
String data=todo_area.getText();//read contents of text area into 'data'
String newline = System.getProperty("line.separator");
boolean hasNewline = data.contains(newline);
if (data == null || !data.trim().equals("")||hasNewline==false)
//INSERT query
java
edited Jun 28 '17 at 6:15
user2025187
2,6383924
asked Nov 19 '12 at 5:18
user1748910
453512
add a comment |
up vote
0
down vote
favorite
I am trying to read data from a textarea (JTextArea) and store the contents into a table(MySQL). I don't want the INSERT query to execute if the textarea is empty or has a newline without any text. I tried the following code but it does not work. Could someone help me out. Thanks.
String data=todo_area.getText();//read contents of text area into 'data'
String newline = System.getProperty("line.separator");
boolean hasNewline = data.contains(newline);
if (data == null || !data.trim().equals("")||hasNewline==false)
//INSERT query
java
edited Jun 28 '17 at 6:15
user2025187
2,6383924
asked Nov 19 '12 at 5:18
user1748910
453512
if (data == null || data.trim().length() == 0 || !hasNewLine)should do the trick
– MadProgrammer
Nov 19 '12 at 5:20
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I am trying to read data from a textarea (JTextArea) and store the contents into a table(MySQL). I don't want the INSERT query to execute if the textarea is empty or has a newline without any text. I tried the following code but it does not work. Could someone help me out. Thanks.
String data=todo_area.getText();//read contents of text area into 'data'
String newline = System.getProperty("line.separator");
boolean hasNewline = data.contains(newline);
if (data == null || !data.trim().equals("")||hasNewline==false)
//INSERT query
java
edited Jun 28 '17 at 6:15
user2025187
2,6383924
asked Nov 19 '12 at 5:18
user1748910
453512
I am trying to read data from a textarea (JTextArea) and store the contents into a table(MySQL). I don't want the INSERT query to execute if the textarea is empty or has a newline without any text. I tried the following code but it does not work. Could someone help me out. Thanks.
String data=todo_area.getText();//read contents of text area into 'data'
String newline = System.getProperty("line.separator");
boolean hasNewline = data.contains(newline);
if (data == null || !data.trim().equals("")||hasNewline==false)
//INSERT query
java
java
edited Jun 28 '17 at 6:15
user2025187
2,6383924
asked Nov 19 '12 at 5:18
user1748910
453512
edited Jun 28 '17 at 6:15
user2025187
2,6383924
asked Nov 19 '12 at 5:18
user1748910
453512
edited Jun 28 '17 at 6:15
user2025187
2,6383924
edited Jun 28 '17 at 6:15
user2025187
2,6383924
edited Jun 28 '17 at 6:15
user2025187
2,6383924
2,6383924
asked Nov 19 '12 at 5:18
user1748910
453512
asked Nov 19 '12 at 5:18
user1748910
453512
asked Nov 19 '12 at 5:18
user1748910
453512
453512
if (data == null || data.trim().length() == 0 || !hasNewLine)should do the trick
– MadProgrammer
Nov 19 '12 at 5:20
add a comment |
if (data == null || data.trim().length() == 0 || !hasNewLine)should do the trick
– MadProgrammer
Nov 19 '12 at 5:20
if (data == null || data.trim().length() == 0 || !hasNewLine) should do the trick– MadProgrammer
Nov 19 '12 at 5:20
if (data == null || data.trim().length() == 0 || !hasNewLine) should do the trick– MadProgrammer
Nov 19 '12 at 5:20
add a comment |
3 Answers
3
active
oldest
votes
up vote
3
down vote
accepted
String data=todo_area.getText().trim(); //read contents of text area into 'data'
if(!data.equals(""))
// code
edited Nov 10 at 20:43
monir alhussini
11510
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
add a comment |
up vote
3
down vote
For me it's enough using this condition:
if ((data.trim().length() > 0) && (!hasNewline))
//do the insert
data.trim().length() > 0 is enough to make sure that the input is not null.
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
answered Nov 19 '12 at 8:41
user1835172
391
add a comment |
up vote
1
down vote
Try using this condition for you check:
if ((data != null) && (data.trim().length() > 0 ) && (!hasNewline))
//do the insert
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
String data=todo_area.getText().trim(); //read contents of text area into 'data'
if(!data.equals(""))
// code
edited Nov 10 at 20:43
monir alhussini
11510
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
add a comment |
up vote
3
down vote
accepted
String data=todo_area.getText().trim(); //read contents of text area into 'data'
if(!data.equals(""))
// code
edited Nov 10 at 20:43
monir alhussini
11510
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
add a comment |
up vote
3
down vote
accepted
up vote
3
down vote
accepted
String data=todo_area.getText().trim(); //read contents of text area into 'data'
if(!data.equals(""))
// code
edited Nov 10 at 20:43
monir alhussini
11510
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
String data=todo_area.getText().trim(); //read contents of text area into 'data'
if(!data.equals(""))
// code
edited Nov 10 at 20:43
monir alhussini
11510
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
edited Nov 10 at 20:43
monir alhussini
11510
edited Nov 10 at 20:43
monir alhussini
11510
edited Nov 10 at 20:43
monir alhussini
11510
11510
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
answered Nov 19 '12 at 5:21
Rasel
14.5k63448
14.5k63448
add a comment |
add a comment |
up vote
3
down vote
For me it's enough using this condition:
if ((data.trim().length() > 0) && (!hasNewline))
//do the insert
data.trim().length() > 0 is enough to make sure that the input is not null.
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
answered Nov 19 '12 at 8:41
user1835172
391
add a comment |
up vote
3
down vote
For me it's enough using this condition:
if ((data.trim().length() > 0) && (!hasNewline))
//do the insert
data.trim().length() > 0 is enough to make sure that the input is not null.
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
answered Nov 19 '12 at 8:41
user1835172
391
add a comment |
up vote
3
down vote
up vote
3
down vote
For me it's enough using this condition:
if ((data.trim().length() > 0) && (!hasNewline))
//do the insert
data.trim().length() > 0 is enough to make sure that the input is not null.
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
answered Nov 19 '12 at 8:41
user1835172
391
For me it's enough using this condition:
if ((data.trim().length() > 0) && (!hasNewline))
//do the insert
data.trim().length() > 0 is enough to make sure that the input is not null.
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
answered Nov 19 '12 at 8:41
user1835172
391
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
edited Nov 19 '12 at 9:05
stealthyninja
9,475103947
9,475103947
answered Nov 19 '12 at 8:41
user1835172
391
answered Nov 19 '12 at 8:41
user1835172
391
answered Nov 19 '12 at 8:41
user1835172
391
391
add a comment |
add a comment |
up vote
1
down vote
Try using this condition for you check:
if ((data != null) && (data.trim().length() > 0 ) && (!hasNewline))
//do the insert
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
add a comment |
up vote
1
down vote
Try using this condition for you check:
if ((data != null) && (data.trim().length() > 0 ) && (!hasNewline))
//do the insert
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
add a comment |
up vote
1
down vote
up vote
1
down vote
Try using this condition for you check:
if ((data != null) && (data.trim().length() > 0 ) && (!hasNewline))
//do the insert
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
Try using this condition for you check:
if ((data != null) && (data.trim().length() > 0 ) && (!hasNewline))
//do the insert
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
answered Nov 19 '12 at 5:24
Abubakkar
12.3k43970
12.3k43970
add a comment |
add a comment |
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if (data == null || data.trim().length() == 0 || !hasNewLine)should do the trick– MadProgrammer
Nov 19 '12 at 5:20