java习题(含答案).pdfVIP

1. 编写程序，用数组实现乘法小九九的存储和输出。【提示：采用多个一维数组。】 public class Multipation { public static void main (String [] args) { // TODO Auto-generated method stub int x [][] new int [9][9]; for (int i 0;i9;i++){ for (int j 0;j9;j++){ if (i j){ int m i+1; int n j+1; x [i][j] m*n; System .out.print (m+*+n+ +x [i][j]); } } System .out.println (); } } } 2. 定义一个类Student，属性为学号、姓名和成绩；方法为增加记录SetRecord 和得到记录 GetRecord。SetRecord 给出学号、姓名和成绩的赋值，GetRecord 通过学号得到考生的成绩。 public class Student { /** * @param args */ private int ID; private String name; private float score; public void SetRecord (int ID,String name,float score){ this.ID ID; name; this.score score; } public float getRecord (int ID){ if (ID this.ID) return this.score; else return -1; } public static void main (String [] args) { // TODO Auto-generated method stub Student s new Student (); s.SetRecord (0,alex,100); float Sco s.getRecord (0); System .out.print (Sco); } } 3. 给出上题中设计类的构造函数，要求初始化一条记录(学号、姓名、成绩)。 4. public class Student { 5. 6. /** 7. * @param args 8. */ 9. private int ID; 10. private String name; 11. private float score; 12. 13. Student (int ID,String name,float score){ 14. this.ID 0; 15. 666; 16. this.score 65; 17. } 18. public void SetRecord (int ID,String name,float score){ 19. this.ID ID; 20. name; 21. this.score score; 22. } 23. public float getRecord (int ID){ 24. if (ID this.ID) 25. return this.score; 26. else 27. return -1; 28. } 29. 30. public static