jtextarea

问题 We were assigned to create a simple compiler as a homework that will take set of instructions (containing variables, conditions, jumps, etc.) and evaluate them. That's already done, but I thought I'd make my program little bit more… “shiny”, and add the ability to load instructions from a text file, just for the sake of user comfort; however, it seems that the JTextArea 's append () method doesn't seem to really like me, as it does exactly nothing. Here's the relevant code: BufferedReader

问题 We were assigned to create a simple compiler as a homework that will take set of instructions (containing variables, conditions, jumps, etc.) and evaluate them. That's already done, but I thought I'd make my program little bit more… “shiny”, and add the ability to load instructions from a text file, just for the sake of user comfort; however, it seems that the JTextArea 's append () method doesn't seem to really like me, as it does exactly nothing. Here's the relevant code: BufferedReader

问题 I've created a jtextarea where a user can modify its content. I want to know,if there is any way, whether the user has modified its content or not before closing the application. Please help. -Thanks in advance 回答1: You need to add a DocumentListener to the Document that backs the text area. Then in the callback methods (insertUpdate(), removeUpdate(), changedUpdate()) of the listener, simply set a flag that something has changed and test that flag before closing the application public class

问题 Hello I would like to make this TextArea stick to the windows size whene I resize it by mouse, the same way as lower buttons does. This is the code it is perfectly working no bugs, please have a glance at it. import java.awt.BorderLayout; import java.awt.Component; import java.awt.Container; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.GridLayout; import java.awt.LayoutManager; import javax.swing

问题 I saw a few questions like this question, but I couldn't get this solved. I cannot get a JScrollPane visible on JTextArea . Can anyone please point out where I have done my mistake? Thanks. package experiement; import java.awt.Dimension; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextArea; public class Experiment extends JFrame{ public Experiment(){ JTextArea tarea=new JTextArea(); tarea.setBounds(100,100,200,200); JScrollPane pan= new JScrollPane(); pan

问题 I saw a few questions like this question, but I couldn't get this solved. I cannot get a JScrollPane visible on JTextArea . Can anyone please point out where I have done my mistake? Thanks. package experiement; import java.awt.Dimension; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextArea; public class Experiment extends JFrame{ public Experiment(){ JTextArea tarea=new JTextArea(); tarea.setBounds(100,100,200,200); JScrollPane pan= new JScrollPane(); pan

问题 I want to have a JTextArea that can completely work instead of a console but I don't know how to do this! Thank you 回答1: The solution to the problem is to redirect System.{in,out,err} to a JTextArea . Starting with System.out it's pretty straight forward to to redirect it to your JTextArea component using System.setOut method. In the example below I've done this using pipes and SwingWorker but that is all fancy stuff to actually get the output simpler to the swing component. Emulating System

问题 I want to have a JTextArea that can completely work instead of a console but I don't know how to do this! Thank you 回答1: The solution to the problem is to redirect System.{in,out,err} to a JTextArea . Starting with System.out it's pretty straight forward to to redirect it to your JTextArea component using System.setOut method. In the example below I've done this using pipes and SwingWorker but that is all fancy stuff to actually get the output simpler to the swing component. Emulating System

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Java Textarea ScrollPane I have code for a scrollbar to appear in a textarea but it doesnt really work. Any suggestions? final JTextArea textArea = new JTextArea(); textArea.setEditable(false); textArea.setBounds(10, 152, 456, 255); textArea.setBorder(border); textArea.setLineWrap(true); sbrText = new JScrollPane(textArea); sbrText.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); panel_1.add

问题 I have a JTextArea that picks up text from another JTextArea and displays that text as seen in this image: I want the JTextArea to wrap the line from where rahul is written as in previous image. And below is the code from my smaller JTextArea from which the text is shown in the larger JTextArea . SimpleDateFormat sdf=new SimpleDateFormat("HH:mm"); String str=MainFrame.un+" ("+sdf.format(new Date())+") :"+txtSend.getText(); DataServices.send(runm+":"+str); // for sending this to its socket