wtsq.java

成绩查询界面

	//wtsq.java
	import javax.swing.*;
	public class wtsq{
		String scoreString;
		String grade;
		double score;
		
		public wtsq(){
			scoreString=JOptionPane.showInputDialog(null,"输入成绩（百分值）");
				score=Double.parseDouble(scoreString); 
					if(score>100||score<0){
						JOptionPane.showMessageDialog(null,"输入信息错误！","结果",JOptionPane.WARNING_MESSAGE);
					}
					if (score>=90) grade="A";
					else if (score>=80) grade="B";
					else if(score>=70) grade="C";
						else if(score>=60) grade="D";
							else if(score<60) grade="E";
	JOptionPane.showMessageDialog(null,grade,"学生的成绩等级",JOptionPane.INFORMATION_MESSAGE);
	}			
		
	public  static void main(String arg[]){
	wtsq gradeJudge=new wtsq();
	System.exit(0);
	}
}




//用switch语句：
import javax.swing.*;

public class Wtsq {
    String chineseScore,grade;
    public Wtsq() {
    	chineseScore=JOptionPane.showInputDialog("输入一位学生的语文成绩：");
    	int score=Integer.parseInt(chineseScore);
    	if(score>=0&&score<=100)
    		switch(score/10){
    			case 10:
    			case 9:grade="等级A";break;
    			case 8:grade="等级B";break;
    			case 7:grade="等级C";break;
    			case 6:grade="等级D";break;
    			default:grade="等级E";
    		}
    	else
    		grade="输入错误的成绩！";
    	JOptionPane.showMessageDialog(null,grade,chineseScore+"学生的成绩等级",
    											JOptionPane.INFORMATION_MESSAGE);
    }
    public static void main(String[] args) {
        Wtsq wtsq=new Wtsq();
        System.exit(0);
    }



//评定多个学生成绩

public class Wtsq2 {
    Scanner scanner;
    public Wtsq2() {
    	scanner=new Scanner(System.in);
    	inputScore();
    }
    public void inputScore(){
    	System.out.println("请输入10位学生的成绩：");
    	for(int i=0;i<10;i++){
    		int s=scanner.nextInt();
    		String grade=judgeGrade(s);
    		System.out.println("成绩"+s+"的等级是"+grade);
    	}
    }
    public String judgeGrade(int score){
    	if(score>=0&&score<=100)
    		switch(score/10){
    			case 10:
    			case 9:return("A");
    			case 8:return("B");
    			case 7:return("C");
    			case 6:return("D");
    			default:return("E");
    		}
    	else
    		return("输入错误的成绩！");
    }
    public static void main(String[] args) {
        Wtsq2 grade=new Wtsq2();
        System.exit(0);
    }
}



//用Applet小程序实现九九乘法表：
import java.awt.*;

public class MultiplyList extends java.applet.Applet {
	String output="";
    public void paint(Graphics g){
    	for(int row=1;row<=9;row++){
        	for(int col=1;col<=row;col++)
        		output+=col+"*"+row+"="+(row*col)+"  ";
        	g.drawString(output,10,row*20);
        	output="";
        }
    }
}