注意:不改动程序的结构,不得增行或删行。
程序运行结果如下:
import java.awt.*;
import java.applet.*;
import java.util.StringTokenizer;
public class ex27_3 extends Applet{
private TextField tf;
private Button btn;
public void init(){
tf = new TextField(25);
add(tf);
btn= new Button("分析");
add(btn);
resize(250, 200);
}
public void paint(Graphics g){
String str = tf.getText();
StringTokenizer st = new StringTokenizer(tf);
int n = 80;
while (!st.hasMoreTokens()){
String tem = st.nextToken();
g.drawString(tem, n, 80);
n += 20;
}
}
public boolean action(Event e, Object o){
if (o == "分析") {
repaint();
return true;
}
else
return false;
}
}
ex27_3.html
<HTML>
<HEAD>
<TITLE>ex27_3</TITLE>
</HEAD>
<BODY>
<applet code="ex27_3.class" width=800 height=400
</applet>
</BODY>
</HTML>