Question

java小程序，怎么把界面和算法结合起来

import java.awt.Color;
import java.awt.Container;

import javax.swing.*;

public class text {
public static void main(String[] args) {
JFrame frame1 = new JFrame("Swing测试");
frame1.setSize(320, 240);
frame1.setLocation(220, 160);
Container contentPane=frame1.getContentPane();
contentPane.setBackground(Color.white);
contentPane.setLayout(null);
JLabel jp1=new JLabel("请输入字符串：");
jp1.setBounds(30, 20, 120, 100);
contentPane.add(jp1);
JTextField field1 = new JTextField(10);
field1.setBounds(120,50,100,30);
contentPane.add(field1);
JLabel jp2=new JLabel("字符串长度为：");
jp2.setBounds(30, 80, 120, 100);
contentPane.add(jp2);
JTextField field2 = new JTextField(10);
contentPane.add(field2);
field2.setBounds(120,110,100,30);
frame1.setVisible(true);
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
和
import java.util.*;
public class text {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("请输入一个字符串：");
String str = s.nextLine();
System.out.println("字符串的长度是："+str.length());
}
}

Answer 1

建议在JFrame中增加一个Button,

然后在Button上增加一个事件监听函数

Button b= new Button(String  button名);
b.addActionListener( new ActionListener() {
@Override
    public void actionPerformed(ActionEvent e) {
        String str =  field1.getText();
        field2.setText(str.length());
    }
});

追问

刚刚在学习java，很多情况都不懂，可以帮忙做一下吗？