Basic HTML version of Foils prepared June 5 99

Foil 55 Basic components

From Java Language in the Computer Science Curriculum ADMI Tutorial Duluth Minnesota -- June 3 99. by Geoffrey C. Fox
For each basic component, one can create one or more instances of the component type and then use one of the "add" methods to place it into a Container such as an applet window.
  • Button button1 = new Button("Click here");
  • add (button1);
  • TextField tf = new TextField(Iinitial text", 30);
  • add(tf);
For each basic component, additional methods allow access to the properties of the components:
  • button1.setBackground (Color.cyan);
  • text which is displayed can be changed:
  • tf.setText("now show a new text");
  • If the user types input into the text field, it can be obtained:
  • stringvar = tf.getText();
Click here
Initial text

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Page produced by wwwfoil on Sat Jun 5 1999