初练AWT,但是第一个练习就出了问题;
import java.awt.*;public class Ui extends java.applet.Applet{
public void init(){
setBackground(Color.white);
}
public void draw(){
add(new Label("Your name:"));
add(new TextField(30));
add(new Label("Sex:"));
CheckboxGroup cbg=new CheckboxGroup();
add(new Checkbox("Male",cbg,true));
add(new Checkbox("Famale",cbg,false));
add(new Label("What are you like:"));
add(new Checkbox("Apple"));
add(new Checkbox("Orange"));
add(new Checkbox("Strawberry"));
add(new Checkbox("Peach"));
add(new Label("How much do you eat them per week:"));
Choice c=new Choice();
c.addItem("less than 1kg");
c.addItem("1kg to 3kg");
c.addItem("more than 3kg");
add(c);
add(new Label("What's your opnion of eat fruit:"));
add(new TextArea("I think",3,60));
add(new Button("OK"));
add(new Button("Clear"));
}
}
最后却一连一个标识都没显出来了!不知道是什么原因,请各位大侠指教!
import java.awt.*;public class Ui extends java.applet.Applet{
public void init(){
setBackground(Color.white);
}
public void draw(){
add(new Label("Your name:"));
add(new TextField(30));
add(new Label("Sex:"));
CheckboxGroup cbg=new CheckboxGroup();
add(new Checkbox("Male",cbg,true));
add(new Checkbox("Famale",cbg,false));
add(new Label("What are you like:"));
add(new Checkbox("Apple"));
add(new Checkbox("Orange"));
add(new Checkbox("Strawberry"));
add(new Checkbox("Peach"));
add(new Label("How much do you eat them per week:"));
Choice c=new Choice();
c.addItem("less than 1kg");
c.addItem("1kg to 3kg");
c.addItem("more than 3kg");
add(c);
add(new Label("What's your opnion of eat fruit:"));
add(new TextArea("I think",3,60));
add(new Button("OK"));
add(new Button("Clear"));
}
}
最后却一连一个标识都没显出来了!不知道是什么原因,请各位大侠指教!
是你的public void draw()这个方法没有调用哈!import java.awt.*;public class awtlist extends java.applet.Applet{
public void init(){
setBackground(Color.white);
add(new Label("Your name:"));
add(new TextField(30));
add(new Label("Sex:"));
CheckboxGroup cbg=new CheckboxGroup();
add(new Checkbox("Male",cbg,true));
add(new Checkbox("Famale",cbg,false));
add(new Label("What are you like:"));
add(new Checkbox("Apple"));
add(new Checkbox("Orange"));
add(new Checkbox("Strawberry"));
add(new Checkbox("Peach"));
add(new Label("How much do you eat them per week:"));
Choice c=new Choice();
c.addItem("less than 1kg");
c.addItem("1kg to 3kg");
c.addItem("more than 3kg");
add(c);
add(new Label("What's your opnion of eat fruit:"));
add(new TextArea("I think",3,60));
add(new Button("OK"));
add(new Button("Clear"));
}
}