Java8 使用 stream().sorted()对List集合进行排序的操作

import java.time.LocalDate;
import java.util.List;
import lombok.Data;
 
@Data
public class StudentInfo{
 
  //名称
  private String name;
 
  //性别 true男 false女
  private Boolean gender;
 
  //年龄
  private Integer age;
 
  //身高
  private Double height;
 
  //出生日期
  private LocalDate birthday; 
}
 

//测试数据，请不要纠结数据的严谨性
List<StudentInfo> studentList = new ArrayList<>();
studentList.add(new StudentInfo("李小明",true,18,1.76,LocalDate.of(2001,3,23)));
studentList.add(new StudentInfo("张小丽",false,18,1.61,LocalDate.of(2001,6,3)));
studentList.add(new StudentInfo("王大朋",true,19,1.82,LocalDate.of(2000,3,11)));
studentList.add(new StudentInfo("陈小跑",false,17,1.67,LocalDate.of(2002,10,18)));
使用年龄进行升序排序
//排序前输出
StudentInfo.printStudents(studentList);
//按年龄排序(Integer类型)
List<StudentInfo> studentsSortName = studentList.stream().sorted(Comparator.comparing(StudentInfo::getAge)).collect(Collectors.toList());
//排序后输出
StudentInfo.printStudents(studentsSortName);

//排序前输出
StudentInfo.printStudents(studentList);
//按年龄排序(Integer类型)
List<StudentInfo> studentsSortName = studentList.stream().sorted(Comparator.comparing(StudentInfo::getAge).reversed()).collect(Collectors.toList());
//排序后输出
StudentInfo.printStudents(studentsSortName);

//排序前输出
    StudentInfo.printStudents(studentList);
    //按年龄排序(Integer类型)
    List<StudentInfo> studentsSortName = studentList.stream()
        .sorted(Comparator.comparing(StudentInfo::getAge).reversed().thenComparing(StudentInfo::getHeight))
        .collect(Collectors.toList());
    //排序后输出
    StudentInfo.printStudents(studentsSortName);

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
 
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
 
/**
 * create By Jlm
 */
 
public class ImgBean{
 
  public static void ImgYin(String s1, String s2, String ImgName){
    try{
      File file = new File(ImgName);
      Image src = ImageIO.read(file);
      int wideth=src.getWidth(null);
      int height=src.getHeight(null);
      BufferedImage image=new BufferedImage(wideth,height,BufferedImage.TYPE_INT_RGB);
      Graphics g=image.createGraphics();
      g.drawImage(src,0,0,wideth,height,null);
      //设置字体颜色
      g.setColor(Color.RED);
      //size字体大小
      g.setFont(new Font("STKaiti",Font.PLAIN,50));
      //wideth控制字体距离右侧边缘距离 height控制字体距离底部距离
      g.drawString(s1,wideth-600,height-400);
      g.drawString(s2,wideth-600,height-500);
      g.dispose();
      FileOutputStream out=new FileOutputStream(ImgName);
      JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
      encoder.encode(image);
      out.close();
    }
    catch(Exception e){
      System.out.println(e);
    }
  }
 
  public static void main(String[] args) {
    ImgYin("1111111","2222222","/Users/jianglinmao/Downloads/11.png");
  }
}

import java.awt.*;
 
/**
 * Created by jlm on 2019/10/22.
 */
public class FontTest {
  public static void main(String[] args) {
    Font[] fonts = GraphicsEnvironment
        .getLocalGraphicsEnvironment().getAllFonts();
    for (Font f : fonts) {
      System.out.println("Name:" + f.getFontName());
    }
  }
}