救急啊！！！期末考试！怎样用JAVA的GUI（图形用户界面）来设计一个小程序！

给你找了一个，我试过，可以用

import javaawt;

import javaxswing;

import javaawtevent;

import javaxswing;//GUi之前要吧这两个都引进来

public class Computer extends JFrame implements ActionListener

{

JButton a1,a2,a3,a4,a5,a6,a7,a8,a9,a0;

JButton b1,b2,b3,b4;

JButton c1,c2,c3,c4;

JTextField t1,t2;

JPanel p1,p2;

JLabel bq1,bq2;

String fuhao;

Double count,count2;

boolean chose=false,cliks;

public static void main(String[] args){

Computer l = new Computer();

}

public Computer(){

Font font = new Font("宋体", FontBOLD, 36);

Font font2 = new Font("宋体", FontBOLD, 20);

a1 = new JButton("1");

a1setFont(font);

a1addActionListener(this);

a2 = new JButton("2");

a2setFont(font);

a2addActionListener(this);

a3 = new JButton("3");

a3setFont(font);

a3addActionListener(this);

a4 = new JButton("4");

a4setFont(font);

a4addActionListener(this);

a5 = new JButton("5");

a5setFont(font);

a5addActionListener(this);

a6 = new JButton("6");

a6setFont(font);

a6addActionListener(this);

a7 = new JButton("7");

a7setFont(font);

a7addActionListener(this);

a8 = new JButton("8");

a8setFont(font);

a8addActionListener(this);

a9 = new JButton("9");

a9setFont(font);

a9addActionListener(this);

a0 = new JButton("0");

a0setFont(font);

a0addActionListener(this);

b1 = new JButton("清空");

b1addActionListener(this);

b2 = new JButton("返回");

b2addActionListener(this);

b3 = new JButton("");

b3addActionListener(this);

b4 = new JButton("=");

b4addActionListener(this);

c1 = new JButton("+");

c1addActionListener(this);

c2 = new JButton("-");

c2addActionListener(this);

c3 = new JButton("x");

c3addActionListener(this);

c4 = new JButton("÷");

c4addActionListener(this);

t1 = new JTextField(25);

t2 = new JTextField(35);

t1setFont(font2);

t2setFont(font2);

p1 = new JPanel();

p2 = new JPanel();

bq1 = new JLabel("结");

bq2 = new JLabel("果");

p1setLayout(new GridLayout(2,3));

p2setLayout(new GridLayout(4,4));

p1add(t1);p1add(b1);p1add(b2);

p1add(t2);p1add(bq1);p1add(bq2 );

p2add(a1);p2add(a2);p2add(a3);p2add(c1);

p2add(a4);p2add(a5);p2add(a6);p2add(c2);

p2add(a7);p2add(a8);p2add(a9);p2add(c3);

p2add(b3);p2add(a0);p2add(b4);p2add(c4);

thisadd(p1,BorderLayoutNORTH);

thisadd(p2,BorderLayoutCENTER);

thissetSize(460,380);

thissetTitle("简易计算器");

thissetLocation(200,200);

thissetDefaultCloseOperation(JFrameEXIT_ON_CLOSE);

thissetVisible(true);

}

public void actionPerformed(ActionEvent e){

Object temp = egetSource();

if(temp == a1){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"1");

chose=false;

}

if(temp == a2){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"2");

chose=false;

}

if(temp == a3){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"3");

chose=false;

}

if(temp == a4){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"4");

chose=false;

}

if(temp == a5){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"5");

chose=false;

}

if(temp == a6){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"6");

chose=false;

}

if(temp == a7){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"7");

chose=false;

}

if(temp == a8){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"8");

chose=false;

}

if(temp == a9){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"9");

chose=false;

}

if(temp == a0){

if(chose==true){t1setText("");t2setText("");}

t1setText(t1getText()+""+"0");

chose=false;

}

if(temp==b3){

cliks=true;

for(int i=0;i<t1getText()length();i++){

if(''==t1getText()charAt(i)){

cliks=false;

break;

}

if(cliks==true){

t1setText(t1getText()+"");

}

}

}

if(temp== c1){

count=DoubleparseDouble(t1getText());

t1setText("");

fuhao = "+";

}

if(temp== c2){

count=DoubleparseDouble(t1getText());

t1setText("");

fuhao = "-";

}

if(temp== c3){

count=DoubleparseDouble(t1getText());

t1setText("");

fuhao = "";

}

if(temp== c4){

count=DoubleparseDouble(t1getText());

t1setText("");

fuhao = "÷";

}

if(temp==b1){

t1setText("");

t2setText("");

}

if(temp==b2){

String s=t1getText();

t1setText("");

for(int i=0;i<slength()-1;i++){

char a = scharAt(i);

t1setText(t1getText()+a);

}

}

if(temp== b4){

count2=DoubleparseDouble(t1getText());

t1setText("");

if(fuhao=="+"){

//int sum=count+count2;

t1setText(count+""+fuhao+""+count2+""+"=");

t2setText(count+count2+"");

chose=true;

}

if(fuhao=="-"){

//int sum=count+count2;

t1setText(count+""+fuhao+""+count2+""+"=");

t2setText(count-count2+"");

chose=true;

}

if(fuhao==""){

//int sum=count+count2;

t1setText(count+""+fuhao+""+count2+""+"=");

t2setText(countcount2+"");

chose=true;

}

if(fuhao=="÷"){

//int sum=count+count2;

if(count2==0){

t1setText(count+""+fuhao+""+count2+"");

t2setText("除数不能为0");

return;

}

t1setText(count+""+fuhao+""+count2+""+"=");

t2setText(count/count2+"");

chose=true;

}

}

}

}

使用Font类

下边是例子

---------------------------------------------------------------------------------------------

import javaawtFont;

import javaxswingJFrame;

import javaxswingJLabel;

public class FontApp extends JFrame {

public FontApp() {

setDefaultCloseOperation(EXIT_ON_CLOSE);

setSize(400, 300);

setLocationRelativeTo(null);

setResizable(false);

getContentPane()setLayout(null);

JLabel lblNewLabel = new JLabel("a String size 18");

lblNewLabelsetFont(new Font(null, FontITALIC, 18));

lblNewLabelsetBounds(12, 30, 232, 29);

getContentPane()add(lblNewLabel);

JLabel lblNewLabel_1 = new JLabel("b String size 14");

lblNewLabel_1setFont(new Font(null, FontBOLD, 14));

lblNewLabel_1setBounds(12, 97, 232, 29);

getContentPane()add(lblNewLabel_1);

setVisible(true);

}

public static void main(String[] args) {

new FontApp();

}

}

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