如何在 Java 中从控制台获取文本或JTextarea
从控制台OutputStream
打印文本?JTextarea
import java.io.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.net.*;
class Clients implements ActionListener
{
JFrame fr;
JPanel p1,p2;
JTextArea asend,achat;
JButton b1,b2;
String s1;
String f;
Clients()
{
fr=new JFrame();
fr.setLayout(new GridLayout(2,1));
p1=new JPanel(new GridLayout(1,1));
p2=new JPanel(new GridLayout(1,2));
achat=new JTextArea(80,80);
asend=new JTextArea(30,30);
b1=new JButton("send");
b2=new JButton("close");
p1.add(new JScrollPane(achat));
p2.add(asend);
p2.add(b1);
p1.setVisible(true);
p2.setVisible(true);
p1.setSize(400,300);
p2.setSize(400,100);
fr.add(p1);
fr.add(p2);
fr.setVisible(true);
fr.setSize(400,400);
b1.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)
{
s1 = asend.getText();
appendData(s1);
send();
asend.setText( " ");
set(s1);
}
}
public void set(String a)
{
f=a;
}
public void appendData(String a)
{
String b=a;
//get data from 'asned' textarea into 'achat' textarea
achat.append( "\n SENT: "+b);
}
public String send()
{
String h=f;
//(return the value of string caught from textbox)
return(h);
}
public void setRec(String g)
{
String s2=g;
achat.append("\n RECIEVED: "+s2);
}
public static void main(String s[])
{
Clients d=new Clients();
/*
* object calls da method send 2 acesss non static
* data from static block of main method
*/
String sendn=d.send();
try
{
Socket so=new Socket("169.254.121.33 ",255);
DataInputStream inp=new DataInputStream(so.getInputStream());
PrintStream outp=new PrintStream(so.getOutputStream());
System.out.println(sendn);
Boolean b=true;
while(b)
{
String incomng=inp.readLine();
d.setRec(incomng); //incoming data is transferrd
System.out.println(incomng);
outp.println(sendn);
if(incomng==null)
{
b=false;
}
}
}
catch(IOException ee)
{
}
}
}
代码首先通过方法set()从JTextArea
achat获取数据..dn方法中的数据被传输到main或console的静态块中..主要问题是我无法从JTextArea
main方法的非静态字段中获取数据( )。