Get user input with textbox class

Processing Libraries
5

Thank you for your answer. I installed the G4P library via the Processing IDE and made the following script using the examples provided in the IDE, to get a textfield:

import g4p_controls.*;


GTextField txf1;


public void setup() {
  size(500, 300);

  txf1 = new GTextField(this, 10, 10, 200, 20);
  txf1.setPromptText("Text field 1");
  txf1.setText("test1"); // works
}


public void draw() {
  background(200, 128, 200);

  if (keyPressed && key == ENTER){
    println(txf1.getText());
    txf1.setText("test2"); // gives nullpointerexception
    }
}

However, when I try to set a new text in the textfield, I get a nullpointer exception. The setText() function does work as expected in the setup, but not in the draw. Does anyone know how I can solve this problem?

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