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[英]A Java program with a loop that allows the user to enter a series of integers, then displays the smallest and largest numbers + the average
[英]java program that allows the user to enter a number of columns and rows of panels with a loop but can't figure out the error
该代码已显示在我的教科书中,但是以下代码在编译时似乎有错误。
Color backColor = Color(red,green,blue);
ColorPanel panel = new ColorPanel(backColor);
pane.add(panel);
这是整个代码:
import javax.swing.*;
import java.awt.*;
import java.util.Random;
import javax.swing.JOptionPane;
public class GUIWindow {
public static void main(String [] args){
JFrame theGUI = new JFrame();
theGUI.setTitle("GUI Example");
String inputStr = JOptionPane.showInputDialog("Number of rows", "5");
if( inputStr ==null ) return;
int rows = Integer.parseInt(inputStr);
String inputStr1 = JOptionPane.showInputDialog("Number of columns", "5");
if(inputStr1 == null)return;
int cols = Integer.parseInt(inputStr1);
theGUI.setSize(cols*5, rows*5);
theGUI.setDefaultCloseOperation(JFram...
Container pane = theGUI.getContentPane();
pane.setLayout(new GridLayout(rows,cols));
Random gen = new Random();
for(int i =1; i<= rows*cols; i++){
int red = gen.nextInt(256);
int green = gen.nextInt(256);
int blue = gen.nextInt(256);
Color backColor = new Color(red,green,blue);
ColorPanel panel = new ColorPanel(backColor);
pane.add (panel);
}
theGUI.setVisible(true);
}
}
您没有导入不是标准swing类的ColorPanel
,必须添加正确的导入,例如( 但com.some.package
名称更正 ):
import com.some.package.ColorPanel;
我发现的只有与摇摆相关的参考是bycom.esri.arcgis.beans.ui.ColorPanel
,该类扩展了javax.swing.JPanel
但不确定是否需要或是否创建了自己的。
只要您的评论说:
@FastSnail:您是否创建了一个名为“ ColorPanel”的类?
@Ayah Al-Harthy:不,这不是在教科书上
并查看代码,您可以将JPanel
与setBackground(Color)
结合使用来做同样的事情(我想)。 使用Color(int,int,int)
构造函数。
Color backColor = new Color(red,green,blue);
JPanel panel = new JPanel();
panel.setBackground(backColor);
// set some dimensions if necessary before adding
panel.add(panel);
另请注意,此行不完整:
theGUI.setDefaultCloseOperation(JFram...
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