Buttons to save and open text file in processing 3

Processing Libraries
9

import controlP5.*;

RadioButton passengers;

ControlP5 cp8;

passengers=cp8.addRadioButton(“No of people”, 104, 36).setPosition(400, 300);
passengers.setSize(20, 20);
passengers.setColorForeground(color(255));
passengers.setColorActive(color(100));
passengers.setColorBackground(color(180));
passengers.setSpacingRow(4);
passengers.addItem(“1”, 1);
passengers.addItem(“2”, 2);
passengers.activate(1);

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in this code i want to perform operation that if 1 is select then print("hello
");
if 2 is select the Hello