java实现随机数生成器

本文实例为大家分享了java实现随机数生成器的具体代码，供大家参考，具体内容如下

自己编的随机数生成器，比较简陋，功能也单一，当作练手。

Application.java

package src;

public class Application {
public static void main(String[] args) {
WindowBoxLayout win=new WindowBoxLayout();
win.setBounds(100,200,300,350);
win.setTitle("随机数生成器");
win.setVisible(true);
}
}

RandomListener.java

package src;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

import javax.swing.*;

public class RandomListener implements ActionListener{
JTextField text1;
JTextArea text2;
Random random=new Random();
int result=0;
public void setJTextField(JTextField t){
text1=t;
}
public void setJTextArea(JTextArea t){
text2=t;
}
@Override
public void actionPerformed(ActionEvent e) {
try{
text2.setText("");
Integer number=Integer.parseInt(text1.getText());
result=random.nextInt(number)+1;
text2.append(result+"");
}
catch(Exception exp){
text2.append("请输入数字字符");

}
}
}

Windowboxlayout.java

package src;

import javax.swing.*;
public class WindowBoxLayout extends JFrame{
/**
*
*/
private static final long serialVersionUID = 1L;
Box baseBox;
JTextField text1;
JTextArea text2;
JButton button;
RandomListener random;
public WindowBoxLayout(){
setLayout(new java.awt.FlowLayout());
init();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
void init(){
baseBox=Box.createVerticalBox();
baseBox.add(new JLabel("请输入随机数的最大范围值："));
baseBox.add(Box.createVerticalStrut(8));
text1=new JTextField(5);
baseBox.add(text1);
baseBox.add(Box.createVerticalStrut(8));
button=new JButton("确定");
baseBox.add(Box.createVerticalStrut(8));
baseBox.add(button);
text2=new JTextArea(6,12);
baseBox.add(Box.createVerticalStrut(18));
baseBox.add(text2);
add(baseBox);
random=new RandomListener();
random.setJTextField(text1);
random.setJTextArea(text2);
button.addActionListener(random);
}

}

类结构图：

效果图：

来源：https://blog.csdn.net/Coder__CS/article/details/51213996