Replace the first 3 characters with some text

  
import javax.swing.JTextArea;

public class Main {
  public static void main(String[] argv) {
    JTextArea ta = new JTextArea("Initial Text");
    int start = 0;
    int end = 3;
    ta.replaceRange("new text", start, end);
  }
}

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Replace the first 3 characters with some text : TextArea « Swing JFC « Java

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