求JAVA36选7彩票程序“图形窗口实现”
- 提问者网友：十年饮冰
- 2021-04-22 14:33
- 五星知识达人网友：等灯
- 2021-04-22 15:59
你是买什么彩票； 福彩还是体彩哦
- 1楼网友：低音帝王
- 2021-04-22 16:48
Math.random()就行了，不就是生成7个随机数么
- 2楼网友：怀裏藏嬌
- 2021-04-22 16:36
import java.awt.Color; import java.awt.Container; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.Iterator; import java.util.List;
import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField;
public class Caipiao{ private JFrame f; private Container c; private JComboBox cbox; private JButton b; private JTextField tf; private JPanel p1; private JPanel p2; public Caipiao(){ f=new JFrame("彩票选购系统"); c=f.getContentPane(); c.setLayout(new GridLayout(2,1)); p1=new JPanel(); p2=new JPanel(); p1.setBackground(Color.gray); cbox=new JComboBox(); cbox.addItem("36选7"); cbox.addItem("15选5"); b=new JButton("开始选取"); tf=new JTextField(25); tf.setEditable(false); b.addActionListener(new ButtonActionListener()); p1.add(cbox); p1.add(b); p2.add(tf); c.add(p1); c.add(p2); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setResizable(false); f.setBounds(500,200,300,100); f.setVisible(true); } class ButtonActionListener implements ActionListener{ public void actionPerformed(ActionEvent e){ String s=(String)cbox.getSelectedItem(); System.out.println("祝您赢大奖!"); int x=Integer.parseInt(s.substring(0,s.indexOf("选"))); int y=Integer.parseInt(s.substring(s.indexOf("选")+1,s.length())); tf.setText(""); ArrayList<Object> al=new ArrayList<Object>(); for(int i=0;i<y;){ double a=Math.round(100*Math.random()); if(a>0 && a<=x){ if(!al.contains((int)a)){ //System.out.println(a); al.add((int)a); i++; } } } int count=al.size(); for(int i=0;i<count;i++){ tf.setText(tf.getText()+getMin(al)+" "); al.remove(getMin(al)); } } } public static Object getMin(List list){ int min=Integer.parseInt(list.get(0)+""); for(Object o:list){ if(Integer.parseInt(o+"")<min){ min=Integer.parseInt(o+""); } } return min; } public static void main(String[] args){ new Caipiao(); } }