[java] How to set the height and the width of a textfield in Java?

     f.setLayout(null);

add the above lines ( f is a JFrame or a Container where you have added the JTestField )

But try to learn 'LayoutManager' in java ; refer to other answers for the links of the tutorials .Or try This http://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html

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