JAVA-通过身高体重计算BMI判断人的体型（体型计算器版）

        这次我们结合我上两篇关于简易计算器界面设计和通过BMI判断人的体型的文章来写一个“体型计算器”（我们初学者要学会综合的、系统的、规范的利用所学知识，完成需求）。同样，相关步骤给出注释以方便大家交流学习。

代码：

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

abstract class People{
	int weight;
	int height;
	public People(int weight, int height) {
		this.weight = weight;
		this.height = height;
	}

	abstract public float stature();
	public String drawResult() {
		System.out.println("体重:"+this.weight+"(KG) 身高:"+this.height+"(cm)");
		String drawresult = new String();
		float statureResult = this.weight/this.stature()-1;
		if(statureResult>=-0.1&&statureResult<=0.1) {
			drawresult = "标准";
		}else if (statureResult<-0.1) {
			drawresult ="偏瘦";
		}else if (statureResult>0.1) {
			drawresult ="偏重";
		}else {
			drawresult = "啥，应该不会运行到这里吧？";
		}
		return drawresult;
	};
}

class Woman extends People {
	Woman(int w, int h){
		super(w, h);
	}
	@Override
	public float stature() {
		//	女性：(身高cm-70)×60﹪=标准体重
		return (float) ((this.height-70.0)*0.6);
	}
}
class Man extends People {
	Man(int w, int h){
		super(w, h);
	}
	@Override
	public float stature() {
		//男性：(身高cm-80)×70﹪=标准体重
		return (float) ((this.height-80.0)*0.7);
	}
}
public class CalculatorBody extends JFrame {
	public CalculatorBody() {
		// 创建窗口
		final JFrame JWindow = new JFrame("体型计算器：");
		// 设置为流动布局，居中 水平间距为0  垂直间距为6
		JWindow.setLayout(new FlowLayout(1,0,6)); 
		// 设置窗体尺寸为 宽340 高 240
		JWindow.setSize(340,240);
		// 设置窗口相对于指定组件的位置。如果组件当前未显示或者 null,则此窗口将置于屏幕的中央。
		JWindow.setLocationRelativeTo(null);
		 //用户单击窗口的关闭按钮时程序执行的操作 WindowConstants.EXIT_ON_CLOSE 代表关闭退出
		JWindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		// 不可以改变大小
		JWindow.setResizable(false); 
		// 设置字体
		// Font FontInfo = new Font("宋体", Font.PLAIN, 20);
		// 创建容器
		JPanel Panel = new JPanel(new GridLayout(0,1));
		// 定义按钮面板，并设置为网格布局，3列
		JPanel HeightPanel2 = new JPanel(new GridLayout(0,3));
		
		JPanel WeightPanel3 = new JPanel(new GridLayout(0,3));
		
		JPanel SexPanel4 = new JPanel(new GridLayout(0,3));
		
		JPanel ButtonPanel5 = new JPanel(new GridLayout(0,2));
		
		JPanel LablePanel6 = new JPanel(new GridLayout(0,2));
		
		JLabel CalculatorLable = new JLabel();
		CalculatorLable.setText("体型计算器");
		Panel.add(CalculatorLable);
		
		JLabel HeightLable = new JLabel();
		HeightLable.setText("Your height:");
		HeightPanel2.add(HeightLable);
//		创建输入高度文本框
		JTextArea HeightJText = new JTextArea(1,6);
		HeightJText.setPreferredSize(new Dimension(100,30));
//		HeightJText.setBorder(BorderFactory.createLineBorder(Color.black,1)); 
		HeightPanel2.add(HeightJText);
//		身高单位标签
		JLabel CmLabel = new JLabel();
		CmLabel.setText("CM");
		HeightPanel2.add(CmLabel);
		
		JLabel WeightLabel = new JLabel();
		WeightLabel.setText("Your Weight:");
		WeightPanel3.add(WeightLabel);
//		创建输入体重文本框
		JTextArea WeightJText = new JTextArea(1,6);
		WeightJText.setPreferredSize(new Dimension(100,30));
		WeightPanel3.add(WeightJText);
		
		JLabel Kglabel = new JLabel();
		Kglabel.setText("KG");
		WeightPanel3.add(Kglabel);
		
		JLabel SexLabel = new JLabel();
		SexLabel.setText("Your Sex:");
		SexPanel4.add(SexLabel);
		
		ButtonGroup buttonGroup1 = new ButtonGroup();
		JRadioButton RadioButtonWoman = new JRadioButton();
		JRadioButton RadioButtonMan = new JRadioButton();
		
		RadioButtonWoman.setSelected(true);
		RadioButtonWoman.setText("女");
		RadioButtonWoman.setMargin(new Insets(0, 0, 0, 0));
		
		RadioButtonMan.setText("男");
		RadioButtonMan.setMargin(new Insets(0, 0, 0, 0));
		
		buttonGroup1.add(RadioButtonMan);
		buttonGroup1.add(RadioButtonWoman);
		SexPanel4.add(RadioButtonWoman);
		SexPanel4.add(RadioButtonMan);
		
		JLabel StatureLabel = new JLabel();
		StatureLabel.setText("Your Stature:");
		LablePanel6.add(StatureLabel);
		JLabel StatureLabelInfo = new JLabel();
		LablePanel6.add(StatureLabelInfo);
		
		JButton Okbutton = new JButton();
		JButton Cancelbutton = new JButton();
		
		Okbutton.setText("OK");
		Cancelbutton.setText("Cancel");
//		OK按钮新增监听事件。
		Okbutton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if (RadioButtonWoman.isSelected()) {
					StatureLabelInfo.setText(new Woman(Integer.parseInt(HeightJText.getText()), 
							Integer.parseInt(WeightJText.getText())).drawResult());
		        } else {
		        	StatureLabelInfo.setText(new Man(Integer.parseInt(HeightJText.getText()), 
							Integer.parseInt(WeightJText.getText())).drawResult());
		        }
			}
		});
		Cancelbutton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				JWindow.dispose();
			}});
		
		ButtonPanel5.add(Okbutton);
		ButtonPanel5.add(Cancelbutton);
		
		// Panel顶部
		JWindow.getContentPane().add(Panel,BorderLayout.NORTH);
		// Panel中部
		JWindow.getContentPane().add(HeightPanel2,BorderLayout.CENTER);
		JWindow.getContentPane().add(WeightPanel3,BorderLayout.CENTER);
		JWindow.getContentPane().add(SexPanel4,BorderLayout.CENTER);
		JWindow.getContentPane().add(LablePanel6,BorderLayout.CENTER);
		// Panel 设置到底部
		JWindow.getContentPane().add(ButtonPanel5,BorderLayout.SOUTH);
		JWindow.setVisible(true);
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		CalculatorBody calculator = new CalculatorBody();
	}

}

实现效果：

（请忽略博主的体型......）