简易成绩表制作（一）

于运用数组，想给出基础版的，回来继续更新

import javax.swing.JApplet;
import javax.swing.JTextArea;

import java.awt.Container;
import java.awt.Font;

public class DoubeArrayTest extends JApplet {
	String output = "学生成绩表\n\n";
	String students[] = { "张三", "李四", "王五", "赵六" };
	String courses[] = { "英语", "数学", "语文", "体育" };
	int grades[][] = { { 77, 68, 86, 73 }, { 96, 87, 89, 81 },
			{ 70, 90, 86, 81 }, { 0, 0, 0, 0 } };
	JTextArea outputArea;

	public void init() {
		setSize(600, 600);
		outputArea = new JTextArea();
		outputArea.setEditable(false); // 不可编辑
		Container container = getContentPane();
		container.add(outputArea);

		buildString();
		coursesAverage();

		output += "\n\n\n最低分：" + minimum() + "\n最高分：" + maximum() + "\n";

		for (int counter = 0; counter < students.length; counter++)
			output += "\n" + students[counter] + "的平均成绩是：" + average(counter);

		outputArea.setFont(new Font("Monospaced", Font.PLAIN, 14));
		outputArea.setText(output);
		showStatus("成绩表打印完成！");

	}

	public void coursesAverage() {
		output += "\n平均分\t";
		int sum = 0;
		for (int i = 0; i < courses.length; i++) {
			sum = 0;
			{
				for (int j = 0; j < students.length; j++)
					sum += grades[j][i];
			}

			output += sum + "\t";
		}
	}

	public double average(int counter) {
		double sum = 0;
		for (int i = 0; i < courses.length; i++)
			sum += grades[counter][i];
		return sum / courses.length;
	}

	public int minimum() {
		int min = grades[0][0];
		for (int i = 0; i < students.length; i++)
			for (int j = 0; j < courses.length; j++) {
				if (grades[i][j] < min)
					min = grades[i][j]; // 注意在这些方法里面不能更改数组的值
			}
		return min;
	}

	public int maximum() {
		int max = grades[0][0];
		for (int i = 0; i < students.length; i++)
			for (int j = 0; j < courses.length; j++) {
				if (grades[i][j] > max)
					max = grades[i][j];
			}
		return max;
	}

	public void buildString() {
		output += "\t";
		for (int i = 0; i < courses.length; i++)
			output += courses[i] + "\t";
		output += "总分";
		for (int i = 0; i < students.length; i++) {
			output += "\n" + students[i] + "\t";
			{
				for (int j = 0; j < courses.length; j++)
					output += grades[i][j] + "\t";
			}
			coursesSum(i);
		}
	}

	public void coursesSum(int i) {
		int sum = 0;
		for (int j = 0; j < courses.length; j++)
			sum += grades[i][j];
		output += sum;
	}
}