怎样改变JTextField的高度呢 java Swing编程

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怎样改变JTextField的高度呢 java Swing编程5

package com.ancong.view;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class calculatorFrame extends JFrame
{
	public static void main(String[] args)
	{
		new calculatorFrame();
	}
	JButton button1 = null;
	JButton button2 = null;
	JButton button3 = null;
	JButton button4 = null;
	JButton button5 = null;
	JButton button6 = null;
	JButton button7 = null;
	JButton button8 = null;
	JButton button9 = null;
	JButton button0 = null;
	JButton buttonSign = null;
	JButton buttonDot = null;
	JButton buttonPlus = null;
	JButton buttonSubtract = null;
	JButton buttonMultiply = null;
	JButton buttonDivision = null;
	JButton buttonClear = null;
	JButton buttonPercent = null;
	JButton buttonBack = null;
	JButton buttonEqual = null;
	
	JTextField textField = null;
	
	JPanel panel = null;
	JPanel panel1 = null;
	
	public calculatorFrame()
	{
		Container c = this.getContentPane();
		
		button1 = new JButton("1");
		button2 = new JButton("2");
		button3 = new JButton("3");
		button4 = new JButton("4");
		button5 = new JButton("5");
		button6 = new JButton("6");
		button7 = new JButton("7");
		button8 = new JButton("8");
		button9 = new JButton("9");
		button0 = new JButton("0");
		buttonSign = new JButton("+/-");
		buttonDot = new JButton(".");
		buttonPlus = new JButton("+");
		buttonSubtract = new JButton("-");
		buttonMultiply = new JButton("*");
		buttonDivision = new JButton("/");
		buttonEqual = new JButton("=");
		buttonBack = new JButton("←");
		buttonPercent = new JButton("%");
		buttonClear = new JButton("C");
		
		textField = new JTextField(12);
//		textField.setBounds(0,0,120,120);
		
		
		panel = new JPanel();
		panel1 = new JPanel();
		
		panel.setLayout(new GridLayout(4,5));
		panel.add(button7);
		panel.add(button8);
		panel.add(button9);
		panel.add(buttonDivision);
		panel.add(buttonBack);
		
		panel.add(button4);
		panel.add(button5);
		panel.add(button6);
		panel.add(buttonMultiply);
		panel.add(buttonClear);
		
		panel.add(button1);
		panel.add(button2);
		panel.add(button3);
		panel.add(buttonSubtract);
		panel.add(buttonPercent);
		
		panel.add(button0);
		panel.add(buttonSign);
		panel.add(buttonDot);
		panel.add(buttonPlus);
		panel.add(buttonEqual);
		
//		GridLayout gridLayout = new GridLayout();
//		panel1.setLayout(new GridLayout());
//		panel1.add(textField,new GridLayout());
		
		c.add(textField,BorderLayout.NORTH);
		c.add(panel,BorderLayout.CENTER);
		
		this.setLocation(506, 305);
		this.setTitle("计算器1.0");
		this.setSize(246,204);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		
	}
}

试过使用GridLayout布局然后放在BorderLayout里面也不行
想把高度改的好看点
这个怎么办？？？
setSize 没效果 setBounds也不行！！！[img][/img]