java基础[对象数组的创建、增强for遍历、最大值]

本文已参与「新人创作礼」活动，一起开启掘金创作之路。

	public static void main1(String[] args) {
		
		Student[] stuArr = new Student[20];
		
		String[] name1 = {"赵","钱","孙","李","周","吴","郑","王"};
		String[] name2 = {"明","阳","微","男","楠","博","三","歌"};
//		遍历才可以用增强for
		for(int i = 0; i < stuArr.length; i++) {
			int id = i + 1;
			int index1 = (int)(Math.random() * 100) % name1.length;
			int index2 = (int)(Math.random() * 100) % name2.length;
			String name = name1[index1] + name2[index2];
			int grade = (int)(Math.random() * 100) % 6 + 1;
			double score = (int)(Math.random() * 101);
			stuArr[i] = new Student(id,name,grade,score);
		}
//		增强for 数据类型 变量名 ： 数组名
		for(Student temp : stuArr) {
			System.out.println(temp.say());
		}
		
		System.out.println("################@@@@@@@@@@@@@@@@@@@@#################");
//		找出谁的成绩最高
		Student maxStudent = stuArr[0];
		for(Student temp : stuArr) {
			if(temp.getScore() > maxStudent.getScore()) {
				maxStudent = temp; 
			}
		}
		System.out.println("maxStudent: " + maxStudent.say());
//		用下标的方式找出谁的成绩最高
		int maxIndex = 0;
		for(int i = 1; i < stuArr.length; i++) {
			if(stuArr[i].getScore() > stuArr[maxIndex].getScore()) {
				maxIndex = i;
			}
		}
		System.out.println("maxStudent: " + stuArr[maxIndex].say());
		
//		用下标方式找出三年级谁的成绩最高
		int maxIndex1 = -1;
		for(int i = 0; i < stuArr.length; i++) {
			if(stuArr[i].getGrade() == 3) {
				if(maxIndex1 == -1) {
					maxIndex1 = i;  //是第一个，无条件改变下标索引
				}else if(stuArr[maxIndex1].getScore() < stuArr[i].getScore()) {
					maxIndex1 = i;
				}
			}
		}
		if(maxIndex1 == -1) {
			System.out.println("不存在三年级的学生!");
		}else {
			System.out.println("maxStudent: " + stuArr[maxIndex1].say());
		}
	}