import java.awt.Button;
import java.awt.Choice;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;


public class windows
{
    public static void main(String[] arg)
    {
        Frame framel = new Frame("作业");
        framel.setSize(400, 300);
        framel.setLocation(10, 10);
        framel.show();
        
        Button b = new Button("退出");
        framel.add(b,"East");
        b.setBounds(300,220,50,30);
        b.setVisible(true);
        b.show();
        
        Label labell = new Label("name");
        labell.setLocation(20, 20);
        framel.add(labell,"East");
        labell.setBounds(50, 30, 30, 30);
        labell.setVisible(true);
        labell.show();
        
        TextField myTextField = new TextField();
        myTextField.setLocation(40, 20);
        myTextField.setSize(100, 30);
        myTextField.setVisible(true);
        myTextField.show();
        
        Choice myChoice = new Choice();
        myChoice.add("1");
        myChoice.add("2");
        myChoice.add("3");
        myChoice.setVisible(true);
        myChoice.show();
    }
}



菜鸟一只，自己写的但是不能显示啊

framel.setVisible(true);即可，不用没个组件都用这句