Java获取一维数组的最小值实现方法

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JOptionPane;

public class ArrayMinValue {

    private JFrame frame;
    private JTextField textField;
    JLabel lblNewLabel_1 = new JLabel();
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ArrayMinValue window = new ArrayMinValue();
                    window.frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the application.
     */
    public ArrayMinValue() {
        initialize();
    }

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frame = new JFrame("获取一维数组最小值");
        frame.setBounds(100, 100, 450, 150);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);

        JLabel lblNewLabel = new JLabel("请在文本框中输入多个整数，以空格为分隔符。例如：3 5 2 562 125");
        lblNewLabel.setBounds(10, 10, 414, 15);
        frame.getContentPane().add(lblNewLabel);

        textField = new JTextField();
        textField.setBounds(10, 35, 414, 21);
        frame.getContentPane().add(textField);
        textField.setColumns(10);      
        lblNewLabel_1.setBounds(115, 70, 309, 15);
        frame.getContentPane().add(lblNewLabel_1);
        JButton button = new JButton("\u8BA1\u7B97");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                do_button_actionPerformed(e);
            }
        });
        button.setBounds(10, 66, 93, 23);
        frame.getContentPane().add(button);    
    }
    protected void do_button_actionPerformed(ActionEvent e) {
        String arrayStr = textField.getText().trim();           //去除左右空格
        if(arrayStr.equals("")){
            JOptionPane.showMessageDialog(null, "请输入数字内容");
            return;
        }
        for (int i = 0; i < arrayStr.length(); i++) {                // 过滤非法输入
            char charAt = arrayStr.charAt(i);
            if (!Character.isDigit(charAt) && charAt != ' ') {
                JOptionPane.showMessageDialog(null, "输入包含非数字内容");
                textField.setText("");
                return;
            }
        }
        String[] numStrs = arrayStr.split(" {1,}");         // 分割字符串
        int[] numArray = new int[numStrs.length];           // 创建整型数组
        // 转换输入为整型数组
        for (int i = 0; i < numArray.length; i++) {
            numArray[i] = Integer.valueOf(numStrs[i]);
        }
        int min = numArray[0];                          // 创建最小数变量
        for (int j = 0; j < numArray.length; j++) {
            if (min > numArray[j]) {                 // 提取最小整数
                min = numArray[j];
            }
        }
        lblNewLabel_1.setText("数组中最小的数是：" + min);       //显示最小值到指定的标签中
    }
}