请问在下面的程序中注释掉buffer.append(newWord);一行为什么applet界面上没有显示。即使没有往StringBuffer中添加,那至少初始化的“initializing”应该显示啊。import java.applet.*;
import java.awt.Graphics;
public class AppletTest extends Applet {
StringBuffer buffer;
public void init(){
buffer=new StringBuffer();
addItem("initializing....");
} public void start(){
addItem("staring....");
} public void stop(){
addItem("stoping....");
}
void addItem(String newWord){
System.out.println(newWord);
//buffer.append(newWord);
repaint();
}
public void paint(Graphics g){
g.drawRect(0,0,getSize().width-1,getSize().height-1);
g.drawString(buffer.toString(),5,15);
}
}
import java.awt.Graphics;
public class AppletTest extends Applet {
StringBuffer buffer;
public void init(){
buffer=new StringBuffer();
addItem("initializing....");
} public void start(){
addItem("staring....");
} public void stop(){
addItem("stoping....");
}
void addItem(String newWord){
System.out.println(newWord);
//buffer.append(newWord);
repaint();
}
public void paint(Graphics g){
g.drawRect(0,0,getSize().width-1,getSize().height-1);
g.drawString(buffer.toString(),5,15);
}
}
buffer=new StringBuffer();
addItem("initializing....");
} void addItem(String newWord){
System.out.println(newWord);
//buffer.append(newWord);
repaint();
}