[박재홍] CHAPTER 7 ~ 8 #14

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	import java.util.*;
	import java.util.stream.*;
	public class ManageHeight{

	private int[][] gradeHeights = new int[5][];

	public static void main(String...args){
	final var manageHeight = new ManageHeight();
	manageHeight.setData();

	manageHeight.printHeight();
	manageHeight.printAverage();
	}

	public void setData(){
	this.insert(1, new int[]{170,180,173,175,177});
	this.insert(2, new int[]{160,165,167,186 });
	this.insert(3, new int[]{158,177,187,176});
	this.insert(4, new int[]{173, 182,181});
	this.insert(5, new int[]{170,180,165,177,172});
	}
	private void insert(int grade, int[] heights){
	this.gradeHeights[grade - 1] = heights;
	}

	public void printHeight(){
	System.out.println("결과");
	IntStream.range(0, gradeHeights.length).forEach(this::printHeight);
	}

	public void printHeight(int classNo){
	var grade = gradeHeights[classNo];
	var sb = new StringBuilder();

	sb.append(String.format("Class No.:%d", classNo+1 ))
	.append("\n")
	.append(Arrays.stream(grade).mapToObj(String::valueOf).collect(Collectors.joining("\n")))
	.append("\n");

	System.out.print(sb);
	}

	public void printAverage(){
	System.out.println("결과");
	IntStream.range(0, gradeHeights.length).forEach(this::printAverage);
	}

	public void printAverage(int classNo){
	final var sb = new StringBuilder();
	var grade = gradeHeights[classNo];

	sb.append(String.format("Class No.:%d", classNo+1 )).append("\n")
	.append("Height average:")
	.append(Arrays.stream(grade).average().getAsDouble())
	.append("\n");

	System.out.print(sb);

	}

	}

24 changes: 24 additions & 0 deletions jaehong/chapter8/ManageStudent.java

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	public class ManageStudent{

	public static void main(String...args){
	Student[] student;
	var manageStudent = new ManageStudent();
	student = manageStudent.addStudent();
	manageStudent.printStudent(student);

	}

	public Student[] addStudent(){
	var student = new Student[3];
	student[0] = new Student("Lim");
	student[1] = new Student("Min");
	student[2] = new Student("Seok", "Seoul", "010xxxxxxx","println@kakao.com");
	return student;
	}

	public void printStudent(Student[] student){
	for(var std: student){
	System.out.println(std.toString());
	}
	}
	}

26 changes: 26 additions & 0 deletions jaehong/chapter8/Student.java

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	public class Student{
	private String name;
	private String address;
	private String phone;
	private String email;

	public Student(final String name, String address, String phone, String email){
	this.name = name;
	this.address = address;
	this.phone = phone;
	this.email = email;
	}

	public Student(final String name){

	this.name = name;
	}


	@Override
	public String toString(){
	return name + " " + address + " " + phone + " " + email;
	}

	}

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