Java: How to convert JTextArea text to bits String

Question

Want to convert JtextArea text to bits String.

I'm using two JTextArea one for input and one for output and one button which is executing following code:

StringBuilder sb = new StringBuilder();

int ssc =Integer.parseInt(jta1.getText());
                        String sc=Integer.toBinaryString(ssc);
                        char[] bc=sc.toCharArray();
                        for (char c : bc) {
                        sb.append("-");


int i =Character.getNumericValue(c);
                    String a = String.valueOf(i);
                    sb.append(a.toString());
                    jta2.setText(a);
Error           

    Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "dsa"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
        at java.lang.Integer.parseInt(Integer.java:449)
        at java.lang.Integer.parseInt(Integer.java:499)
        at MainFrame$2.actionPerformed(MainFrame.java:57)

This is the error im getting when i click button Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "dsa" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:449) at java.lang.Integer.parseInt(Integer.java:499) at MainFrame$2.actionPerformed(MainFrame.java:57) — programmer one, May 25 '14 at 13:16
Its clear from the exception that it is converting a string into integer. — Braj, May 25 '14 at 13:23
Read it here [Restricting JTextField input to Integers](http://stackoverflow.com/questions/11093326/restricting-jtextfield-input-to-integers) — Braj, May 25 '14 at 13:24

Paul Samsotha · Accepted Answer · 2014-05-25T13:32:52.697

Integer.parseInt(jta1.getText());

Assuming you are trying to parse more than just numbers, the above is causing the NumberFormatException. the parser can only parse number strings like "1234", not letters "dsa".

java.lang.NumberFormatException: For input string: "dsa"

What you can do is iterate through the characters and just cast each to an int and append the binary string of each character

for (char c : txt.toCharArrray() ) {
    String binaryOfCharacter = Integer.toBinaryString((int)c);
    // append to StringBuilder
}

_{Note: each character only returns the seven bit repsresentation}

Java: How to convert JTextArea text to bits String

1 Answers1