使用 JTextfield 文本重复搜索 JTable [英] Search a JTable repeatedly using JTextfield text
本文介绍了使用 JTextfield 文本重复搜索 JTable的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
以下代码将从文本字段中获取文本并在 JTable 中搜索它.它只显示文本的第一次出现.我也需要连续出现.所以,请指导我如何实现这一目标.提前致谢.
The following code will get text from a textfield and searches it in a JTable. It shows only the first occurence of the text. I need successive occurence too. So, please guide me how to achieve this. Thanks in advance.
private void search8()
{
String target8 = sear8.getText();
for(int row = 0; row < table8.getRowCount(); row++)
for(int col = 0; col < table8.getColumnCount(); col++)
{
String next8 = (String)table8.getValueAt(row, col);
if(next8.equals(target8))
{
showSearchResults(row, col);
return;
}
}
}
更新:
private void showSearchResults(int row, int col)
{
CustomRenderer renderer = (CustomRenderer)table8.getCellRenderer(row, col);
renderer.setTargetCell(row, col);
Rectangle r8 = table8.getCellRect(row, col, false);
table8.scrollRectToVisible(r8);
table8.repaint();
}
class CustomRenderer implements TableCellRenderer
{
public CustomRenderer()
{
label = new JLabel();
label.setHorizontalAlignment(JLabel.CENTER);
label.setOpaque(true);
targetRow = -1;
targetCol = -1;
}
public Component getTableCellRendererComponent(JTable table,
Object value,boolean isSelected,boolean hasFocus,int row, int column)
{
if(isSelected)
{
label.setBackground(table.getSelectionBackground());
label.setForeground(table.getSelectionForeground());
}
else
{
label.setBackground(table.getBackground());
label.setForeground(table.getForeground());
}
if(row == targetRow && column == targetCol)
{
label.setBackground(new Color(176,196,222));
//label.setBorder(BorderFactory.createLineBorder(Color.red));
label.setFont(table.getFont().deriveFont(Font.BOLD));
}
else
{
label.setBorder(null);
label.setFont(table.getFont());
}
label.setText((String)value);
return label;
}
public void setTargetCell(int row, int col)
{
targetRow = row;
targetCol = col;
}
}
推荐答案
// I'd, personally, make this protected as you may wish to change the how the search
// is performed in the future.
protected void search8() {
// You've assumed that there are only ever 40 elements
// while you've allowed for a variable number of search positions
// You would need (at least) (rowCount * colCount) * 2 elements to be
// safe. This is a little ridiculous considering that there might
// only be 1 reuslt in the table
// int[] sarr8 = new int[40]; <-- Don't really want to do this
// Instead, we should use a dynamic array instead
// The ArrayList is a Collection implementation backed by an array
// but it has the means to grow (and shrink) to meet the capacity requirements
List<Point> slist8 = new ArrayList<Point>(25); // <-- you could change the initial value as you see fit
int i = 0;
String target8 = sear8.getText();
for (int row = 0; row < table8.getRowCount(); row++) {
for (int col = 0; col < table8.getColumnCount(); col++) {
String next8 = (String) table8.getValueAt(row, col);
if (next8.contains(target8)) {
// Okay, this kinda cheating, but we want to store col/row or x/y
// cell coordinates. You could make your own class "Cell" class,
// but for what we want, this is exactly the same
Point cell = new Point(col. row);
//sarr8[i] = row;
//sarr8[i + 1] = col;
//i = i + 2;
slist8.add(cell);
}
}
}
//System.out.println(sarr8.length);
System.out.println(slist8.size());
//for (int j = 0; j < sarr8.length; j += 2) {
// showSearchResults(sarr8[j], sarr8[j + 1]);
// return;
//}
// Now, personally, I'd pass in the whole result set to the "showSearchResults"
// method, because, IMHO, that's the methods domain of responsibility, ours was
// to simply find the results.
showSearchResults(slist8);
// At this point, the showSearchResults method can determine how it wants to display
// the search results
}
@Sujay 在他的回答中也展示了这种方法
This approach was also demonstrated by @Sujay in his answer
更新
for (Point p : slist8) {
showSearchResults(p.x, p.y);
}
其他
private void showSearchResults(List<Point> results)
{
for (Point p : results)
{
int col = p.x;
int row = p.y;
CustomRenderer renderer = (CustomRenderer)table8.getCellRenderer(row, col);
renderer.setTargetCell(row, col);
Rectangle r8 = table8.getCellRect(row, col, false);
table8.scrollRectToVisible(r8);
}
table8.repaint();
}
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