学习大数据

大数据菜鸟学习

学生成绩管理

Scanner sc = new Scanner( System.in); System.out.print(“请输入学生人数：”); int num = sc.nextInt(); int[] sgrade = new int[num]; String[] sname = new String[num]; for (int i = 0; i < sgrade.length; i++) { System.out.print(“请输入学生姓名：”); sname[i] = sc.next(); System.out.print(“请输入学生成绩：”); sgrade[i] = sc.nextInt(); } for (int i = 0; i < sname.length - 1; i++) { for (int j = 0; j < sname.length - 1 - i; j++) { if (sgrade[j] > sgrade[j+ 1]) { int temp = sgrade[j]; sgrade[j] = sgrade[j + 1]; sgrade[j + 1] = temp;

String temp1 = sname[j]; sname[j] = sname[j + 1]; sname[j + 1] = temp1; } } } System.out.println(“按照成绩升序排后学生的姓名和成绩：”); for (int i = 0; i < sgrade.length; i++) { System.out.print(“姓名：” + sname[i]); System.out.print(“成绩：” + sgrade[i]); System.out.println(); }

521图画 package cn.ll.day02;

import java.awt.Color; import java.awt.Font; import java.awt.Graphics;

import javax.swing.JPanel;

public class MyJpane extends JPanel implements Runnable{ public MyJpane(){ //创建线程 Thread t=new Thread(); t.run();

} public void paint(Graphics g){ //g:画笔 super.paint(g); g.setColor(Color.BLUE); g.setFont(new Font(Font.DIALOG, Font.BOLD, 50)); g.drawString("521", 440, 440); g.drawString("老詹", 390, 390); this.setBackground(Color.black); int x1=300; int y1=300; g.fillOval(x1, y1, 100, 100); g.setColor(Color.black); g.fillOval(x1, y1, 80, 80); g.setColor(Color.cyan); g.drawRect(400,400,260,80); g.fillOval(400+50, 400+50, 40, 40); g.fillOval(550+50, 400+50, 40, 40); } public void run(){ while(true){ //月亮移动 int x1=300; x1++; if(x1>=800){ x1=0; } repaint();//重绘，重复调用paint方法 try { Thread.sleep(100); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

}