计算机等级考试2级 Java-大题题库集

1、格式化DecimalFormat pre = new DecimalFormat(“”);JTextField output;output.setText(pre.format(result);Applet题1import java.applet.*import java.awt.Graphics;public class Java_1 extendsAppletpublic void paint(Graphics g)g.drawString(欢迎您,25,25);题2import java.awt.*;import jave.applet.*;public class Java_2 ext

2、endsAppletTextArea outputArea;public void init()setLayout(new BorderLayout();outputArea = new TextArea();add(outputArea);for(long i = 0; i 8002int a,x = 2008;while(x!=0)a = x % 10;x = x / 10;题2矩阵乘法public class Java_2 public static void main(String args) int a = 2, 3, 4, 4, 6, 5;int b = 1, 5, 2, 8, 5

3、, 9, 10, -3, 2, 7, -5, -18;/*Found*int c = new int24;for (int i = 0; i 2; i+) /*Found*for (int j = 0; j 4; j+) /*Found*cij = 0;for (int k = 0; k 3; k+)/*Found*cij += aik * bkj;System.out.print(cij + );System.out.println();题3import java.io.*;public class Java_1public static void main(String args) thr

4、ows ExceptionInputStreamReader ir = new InputSteamReader(System.in);BufferedReader in = new BufferedReader(ir);String s = in.readLine();int year = Integer.parseInt(s);if(year%4=0 & year%100!=0 | year%400=0)System.out.println(year+是闰年);elseSystem.out.println(year+不是闰年)题4自定义排序public class Java_2public

5、 static void main(String args)Student java = new Student3;java0 = new Student(李明, 80);java1 = new Student(赵冬, 75);java2 = new Student(王晓, 98);/*Found*Arrays.sort(java);System.out.println(Java成绩降序排序的结果是：);for (int i = 0; i java.length; i+)Student e = javai;/*Found*System.out.println(name= + e.getName

6、()+ ,fenshu= + e.getFenshu();/*Found*class Student implements Comparablepublic Student(String n, double f)name = n;fenshu = f;public String getName()return name;public double getFenshu()return fenshu;public int compareTo(Object otherObject)Student other = (Student)otherObject;if (fenshu other.fenshu) return -1;return 0;private String name;/*Found*private double fenshu;题5public class Java_1 public static void main(String args)int n;double e = 1.0;System.out.print(请输入n: );/*Found*Scanner scan = new Scanner (System.in);String nstr = scan.next();/*Found*n = Integ