java取出数组中最小值

package tast2;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import java.awt.CardLayout;

import javax.swing.JButton;

import java.awt.event.ActionListener;

import java.util.Scanner;

import java.awt.event.ActionEvent;

import javax.swing.JTextField;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.SwingConstants;

public class A2 extends JFrame {

private JPanel contentPane;

private JTextField textField;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

A2 frame = new A2();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

/**

* Create the frame.

*/

public A2() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JLabel label = new JLabel("\u663E\u793A");

label.setBounds(146, 144, 167, 15);

contentPane.add(label);

JButton btnNewButton = new JButton("\u786E  \u5B9A");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

String s ;

try {

s = textField.getText().trim();

for(int i =0;i

char charAt = s.charAt(i);

if(!Character.isDigit(charAt) && charAt != ' ') {

JOptionPane.showMessageDialog(null,"输入包含非数子内容");

textField.setText("");

return ;

}

}

String[] numStr = s.split("{1,}");

int[] numArray = new int[numStr.length];

//转换输入为整数数组

for(int i =0;i

numArray[i]=Integer.valueOf(numStr[i]);

}

int min = numArray[0];

for(int j=0;j

if(min>numArray[j]) {

min=numArray[j];

}

}

label.setText("最小数为："+min);

System.out.println(s);

}catch(NullPointerException e) {

e.printStackTrace();

}

}

});

btnNewButton.setBounds(180, 92, 69, 23);

contentPane.add(btnNewButton);

textField = new JTextField();

textField.setBounds(121, 33, 226, 21);

contentPane.add(textField);

textField.setColumns(10);

}

}