Program 1 package dataflair; import java.io.*; public class TestRead1 { public static void main(String[] args) throws IOException { File F=new File(“d://dataflair/student.txt”); char ch; int n; if(F.isFile()) { FileInputStream fis=null; try { fis=new FileInputStream(F); while((n=fis.read())!=-1)...
Program 1 package dataflair; import java.util.*; public class TestMain { public static void main(String[] args) { ArrayList<Integer>A=new ArrayList<Integer>(5); System.out.println(A.isEmpty()); A.add(4); //0 A.add(5); //1 A.add(53); //2 A.add(17); //3 A.add(2); //4 A.add(53); //5 A.add(67); A.add(53); A.add(77);...
Program 1 package dataflair; import java.util.*; public class TestCursor1 { public static void main(String[] args) { Vector V=new Vector(); V.add(“Dataflair”); V.add(123); V.add(45.66); V.add(true); V.add(“Dataflair”); V.add(123); V.add(45.66); V.add(true); V.add(“Dataflair123”); V.add(678); V.add(45.88); V.add(false); Enumeration e=V.elements(); while(e.hasMoreElements())...
Program 1 package dataflair; import java.util.*; public class TestMap1 { public static void main(String[] args) { Map<Integer,String> M=new HashMap<Integer,String>(); System.out.println(M.size()); M.put(1, “Limca”); M.put(3, “Water”); M.put(5, “Frooti”); M.put(2, “Limca”); M.put(7, “Frooti”); M.put(4, “Limca”); M.put(6, “Water...
Program 1 package dataflair; import java.io.*; public class TestWrite1 { public static void main(String[] args) throws IOException { FileOutputStream fos=null; byte b[]; try { File F=new File(“d://filedata”); F.mkdir(); fos=new FileOutputStream(“d://filedata/student.txt”); char ch; String S=”Data...
Program 1 package dataflair; import java.util.*; public class TestTree { public static void main(String[] args) { ArrayList<Integer>A=new ArrayList<Integer>(); A.add(5); A.add(2); A.add(6); A.add(2); A.add(4); A.add(1); A.add(10); A.add(8); A.add(9); A.add(7); // System.out.println(“ArrayList: “+A); TreeSet<Integer>T1=new TreeSet<Integer>(A); System.out.println(“TreeSet...
Program 1 package dataflair; import java.io.Serializable; public class Student implements Serializable { int rno; String name; int age; public Student(int rno, String name, int age) { this.rno = rno; this.name = name; this.age =...
Program 1 package dataflair; import java.io.*; public class TestCount { public static void main(String[] args) throws IOException { File F=new File(“d://dataflair/student.txt”); FileInputStream fis=null; char ch; int n; int cc=0,spc=0,dgc=0,sp=0; if(F.isFile()) { fis=new FileInputStream(F); while((n=fis.read())!=-1)...
Program 1 // Copy one file into second file package dataflair; import java.io.*; public class TestFileCopy { public static void main(String[] args) throws IOException { File F1=new File(“d://dataflair/student.txt”); File F2=new File(“d://dataflair/student12345.txt”); char ch; int...
Program 1 package dataflair; public class Department extends Employee { private int salary; private String deptname; public Department() { } public Department(int eid, String ename, int mobile,int salary,String deptname) { super(eid,ename,mobile); this.salary=salary; this.deptname=deptname; }...
