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hello frnds!! i want to know which things in programming slows the running process of program..... i want that my program should run in minimum time..... 
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Following are the server-client programs,,,, in this client can send files and server have to save it,,,,,i want to add progressbar.....plz help me out!!! client:- import java.net.*; import java.io.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; class ftpclient extends JFrame implements ActionListener { JButton b1,b2; JTextField t1; ftpclient() { b1 =new … 
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i have created a chat program and i want to add smiley to it......i know how to add smiley in a program,but my logic works for single smiley in a message.......want logic for multiple smiley in prgm,,,, int zi=msg.indexOf(':'); if(zi!=-1) { try{ st1=msg.substring(msg.indexOf(':'),msg.indexOf(':')+2); String msg_start=msg.substring(1,msg.indexOf(':')); int msg_end_index=msg.indexOf(':')+3; if(msg_end_index>msg.length()) msg_end=""; else …
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Following code is for deleting elemnt from array but it shows NullPointerException at **if(names[k].equals(user))** ... how to remove it!!! public class del_array { public static void main(String s[]) { String names[ ] = new String [10]; names[0]="admin"; names[1]="b"; names[3]="m"; String user="b"; for(int k=0;k<names.length;k++) { if(names[k].equals(user)) { String item=names[k]; for(int j=k;j<names.length-1;j++) …
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i want to send large files,,,,,this program only send upto size:1024*1024 ,,,,plz help me out!! client- import java.net.*; import java.io.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; class ftpclient extends JFrame implements ActionListener { JButton b1,b2; JTextField t1; ftpclient() { b1 =new JButton("Select File"); b2 = new JButton("Send File to Server"); …
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