Java value Swing series control one

Swing series of controls

JTextArea

JTextArea is a control that implements multi-line text

Constructor

• JTextArea() Construct a new TextArea.

• JTextArea(Document doc) Constructs a new JTextArea with the given document model, all other parameters default to (null, 0, 0) .

• JTextArea(Document doc, String text, int rows, int columns) Constructs a new JTextArea with the specified number of rows and columns and the given model.

• JTextArea(int rows, int columns) Constructs a new, empty TextArea with the specified number of rows and columns.

• JTextArea(String text) Constructs a new TextArea that displays the specified text.

• JTextArea(String text, int rows, int columns) Constructs a new TextArea with the specified text, number of rows, and number of columns.

Commonly used methods

• ##append(String text) Insert text at the end

• getColumns()

• ##getLineWrap()

  Get the line wrapping strategy of the text area

• setLineWrap(boolean wrap)

  Set the line wrapping strategy. If set to true, it will automatically wrap at the end of a line.

• setWrapStyleWord(boolean wrap)

  Set line breaks and word breaks, that is, if you have not finished writing a word when it reaches the end, your word will be moved to the next line together, instead of just Move one word down so that the words are not separated

• setFont(Font f)

  Set the font

• insert(String str, int pos)

  Insert the specified text at the specified position.

• replaceRange(String str, int start, int end)

  Replace the text from the indicated start position to the end position with the given new text.

• setRows(int rows)

  Set the number of rows for this TextArea.

JScrollPane

Constructor

• JScrollPane()

  Create a An empty (portless view) JScrollPane that displays both horizontal and vertical scroll bars when needed.

• JScrollPane(Component view)

  Creates a JScrollPane that displays the content of the specified component. Horizontal and vertical scroll bars will be displayed as long as the content of the component exceeds the view size.

• JScrollPane(Component view, int vsbPolicy, int hsbPolicy)

  Create a JScrollPane that displays the view component in a viewport, and the view position can use a pair of scrolls strip control. vsbPolicy and hsPolicy are used to control when the scroll bar appears. The values ​​are as follows:

#HORIZONTAL_SCROLLBAR_ALAWAYS
• : Always show horizontal scroll axis.

HORIZONTAL_SCROLLBAR_AS_NEEDED
• : The horizontal scroll axis appears when the horizontal area of ​​the component content is larger than the display area.

HORIZONTAL_SCROLLBAR_NEVER
• : The horizontal scroll axis is always not displayed.

VERTICAL_SCROLLBAR_ALWAYS
• : Always show the vertical scroll axis.

VERTICAL_SCROLLBAR_AS_NEEDED
• : The vertical scroll axis appears when the vertical area of ​​the component content is larger than the display area.

VERTICAL_SCROLLBAR_NEVER
• : The vertical scroll axis is always not displayed.

##JScrollPane(int vsbPolicy, int hsbPolicy)

Create an empty pane with the specified scroll bar policy (View without port) JScrollPane.

• Commonly used methods

setHorizontalScrollBarPolicy(int policy)

Determine when the horizontal scroll bar Displayed on the scroll pane.

• setVerticalScrollBarPolicy(int policy)
Determines when a vertical scroll bar is displayed on the scroll pane.

• setColumnHeaderView(Component view)
Create a column header viewport (if necessary), set its view and then add this column header viewport to the scroll pane . Set the horizontal header

• setRowHeaderView(Component view)
Set the vertical header, which is to create a row title viewport

• setViewportBorder(Border viewportBorder)
Adds a border around the viewport.

• Example

package demo;import javax.swing.*;import javax.swing.border.Border;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class demo extends JFrame {private JTextField textField;public demo() {super();this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setBounds(100, 100, 400, 300);
        JPanel panel_North = new JPanel();this.getContentPane().add(panel_North, BorderLayout.NORTH);
        FlowLayout flowLayout = (FlowLayout) panel_North.getLayout();
        flowLayout.setAlignment(FlowLayout.LEFT);

        JLabel label = new JLabel("name:");
        label.setFont(new Font("微雅软黑", Font.BOLD + Font.ITALIC, 20));
        panel_North.add(label);

        textField = new JTextField(20);
        textField.setFont(new Font("微雅软黑", Font.BOLD + Font.ITALIC, 20));
        panel_North.add(textField);

        JTextArea textArea = new JTextArea(6, 30);
        textArea.setFont(new Font("微雅软黑", Font.BOLD + Font.ITALIC, 20));
        textArea.setWrapStyleWord(true);
        textArea.setLineWrap(true);

        JPanel panel_center = new JPanel();

        FlowLayout flowLayout_center = (FlowLayout) panel_center.getLayout();
        flowLayout_center.setAlignment(FlowLayout.LEFT);this.getContentPane().add(panel_center, BorderLayout.CENTER);  //设置中间的组件JScrollPane scrollPane = new JScrollPane(textArea);
        scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);   //设置水平滚动条出现的时间scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);//设置垂直滚动条出现的时间panel_center.add(scrollPane);

        JPanel panel_header = new JPanel();
        JLabel label_header = new JLabel("水平表头");
        panel_header.add(label_header);
        scrollPane.setColumnHeaderView(panel_header);   //设置水平表头JPanel panel_v = new JPanel();
        JLabel label_v = new JLabel("垂直表头");
        panel_v.add(label_v);
        scrollPane.setRowHeaderView(panel_v);    //设置垂直表头}public static void main(String[] args) {
        demo f = new demo();
        f.setVisible(true);

    }

}

JScrollBar

滚动条的实现。用户在滚动条内移动滑块可确定显示区域中的内容。该程序通常将显示调整为滚动条的结束代表可显示内容的结束，或内容的 100%。滚动条的开始为可显示内容的开始，或 0%。然后滑块在其边界中的位置转换为可显示内容对应的百分比。

构造函数

• JScrollBar() 创建具有下列初始值的垂直滚动条

• JScrollBar(int orientation) 创建具有指定方向和下列初始值的滚动条,其中的值为JScrollBar.VERTICAL(垂直滚动条),JScrollBar.HORIZONTAL(水平滚动条)

• JScrollBar(int orientation, int value, int extent, int min, int max) 创建具有指定方向、值、跨度、最小值和最大值的一个滚动条。value为当前滚动条位于的位置，min和max共同组成了滚动条的范围，extent表示滚动条的跨越的宽度

常用方法

*addAdjustmentListener(AdjustmentListener l) 添加一个滚动条调整的事件侦听器，例子如下：

scrollBar_1.addAdjustmentListener(new AdjustmentListener() {    //添加一个事件侦听器@Overridepublic void adjustmentValueChanged(AdjustmentEvent e) {
                scrollBar_1=(JScrollBar)e.getSource();    //获得监听的控件，这里要强制转换成滚动条类型的textField_North.setText(""+scrollBar_1.getValue());    //r如果滚动条移动了，那么就将刻度显示在文本域中}
        });

• setModel(BoundedRangeModel newModel) 设置处理滚动条的以下四个基本属性的模型：minimum、maximum、value 和 extent。通过这个函数可以将滚动条与其他的控件绑定在一起，下面将会演示一下JTextField绑定滚动条

//获取文本字段的可见性，如果文本字段大小大于分配给他的大小那么可以对他进行调整BoundedRangeModel boundedRangeModel = textField.getHorizontalVisibility();//设置处理滚动条的以下四个基本属性的模型：minimum、maximum、value 和 extent。scrollBar.setModel(boundedRangeModel);   //通过这个的绑定，就将滚动条和文本域绑定在一起了

• setOrientation(int orientation) 将滚动条的方向设置为 VERTICAL 或 HORIZONTAL。

• setMaximum(int maximum) 设置模型的 maximum 属性。

• setMinimum(int minimum) 设置模型的 minimum 属性。

• setValue(int value) 设置当前的值

• setUnitIncrement(int unitIncrement) 设置 unitIncrement 属性,设置拖曳滚动轴时，滚动轴刻度一次的变化量。

• setBlockIncrement(int blockIncrement) 设置 blockIncrement 属性, 设置当鼠标在滚动轴列上按一下是，滚动轴一次所跳的区块大小

• setVisibleAmount(int extent); 设置extent值

JTextPanel

可以用以图形方式表示的属性来标记的文本组件,相当于处理文本的工具word文档一样，可以在其中为文本设置不同的属性

构造函数

• JTextPane()创建一个新的 JTextPane。

• JTextPane(StyledDocument doc) 创建具有指定文档模型的新 JTextPane。

常用方法

• setCharacterAttributes(AttributeSet attr, boolean replace) 将给定属性应用于字符内容，这个是将样式应用到文本的函数

• getStyledDocument() 获取与编辑器关联的模型。

实例

package demo;import javax.swing.*;import javax.swing.text.*;import java.awt.*;/** * Created by chenjiabing on 17-5-22. */public class TextPane extends JFrame {public TextPane() {super();this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setBounds(100, 100, 400, 500);

        JTextPane textPane = new JTextPane();//        textPane.setBackground(Color.black);//      textPane.setFont(new Font("微软雅黑",Font.ITALIC,20));JScrollPane scrollPane = new JScrollPane(textPane);
        scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

        SimpleAttributeSet simpleAttributeSet = new SimpleAttributeSet();  //创建一个属性StyleConstants.setForeground(simpleAttributeSet, Color.GREEN);    //设置前景色StyleConstants.setBold(simpleAttributeSet, true);    //设置加粗StyleConstants.setUnderline(simpleAttributeSet, true);    //设置下划线StyleConstants.setFontFamily(simpleAttributeSet, "微软雅黑");   //设置字体StyleConstants.setFontSize(simpleAttributeSet, 20);   //设置字体大小StyleConstants.setItalic(simpleAttributeSet, true);   //设置倾斜StyleConstants.setStrikeThrough(simpleAttributeSet, true);   //设置删除线StyleConstants.setFirstLineIndent(simpleAttributeSet, 2.5f);    //设置首行缩进StyleConstants.setLineSpacing(simpleAttributeSet, 20);
        StyleConstants.setRightIndent(simpleAttributeSet, 2.4f);


        textPane.setCharacterAttributes(simpleAttributeSet, true);//        Document doc=textPane.getStyledDocument();   //获得关联的文本//        try {//            doc.insertString(doc.getLength(), "陈加兵", simpleAttributeSet);   //向文本中插入字符串//        }catch (BadLocationException e)//        {//            e.printStackTrace();//        }this.getContentPane().add(scrollPane, BorderLayout.CENTER);
    }public static void main(String[] args) {
        TextPane text = new TextPane();
        text.setVisible(true);


    }


}

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