how to use tables ?

2005-07-29 10:49:15 149 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

百度API实现人流量数量检测（动态）百度的这个API还挺好用的，对与不追求高精度的人来说非常适用，结合他官方给的文档，极易上手。需要做的就是通过API Key和Secret Key获取的access_token。然后稍微修改下代码就行，但是他给的代码并没有直接从摄像头获取视频，而是读取一个文件夹，那么就需要自己先对摄像头的输出视频进行处理。识别结果如下，"person_num"是当前画面的人数，in是累计进入的人数，out是累计走出去的人数。他这个有个缺点就是返回值里边并没有实时返回in和out的值，而是都是0，但是这个图片上有，图片阅读详情

how to use tables ?

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利用LTspice设计Pt100测温电路是一种广泛使用的温度传感器，它属于（RTD, Resistance Temperature Detector）的类型，通常用于温度测量。在0°C时，的电阻值为100欧姆，且它的电阻值会随着温度的升高而升高。PT100热电阻温度阻值对应表）因此可以根据这一特性来检测出环境温度。阅读详情

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/*
*例子，可以运行的。
*/

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;

/**
* TableDemo is just like SimpleTableDemo, except that it
* uses a custom TableModel.
*/
public class TableDemo extends JPanel {
private boolean DEBUG = false;

public TableDemo() {
super(new GridLayout(1,0));

JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));

//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);

//Add the scroll pane to this panel.
add(scrollPane);
}

class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
};

public int getColumnCount() {
return columnNames.length;
}

public int getRowCount() {
return data.length;
}

public String getColumnName(int col) {
return columnNames[col];
}

public Object getValueAt(int row, int col) {
return data[row][col];
}

/*
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
*/
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}

/*
* Don't need to implement this method unless your table's
* editable.
*/
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
}
}

/*
* Don't need to implement this method unless your table's
* data can change.
*/
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
}

data[row][col] = value;
fireTableCellUpdated(row, col);

if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
}
}

private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();

for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
}
System.out.println();
}
System.out.println("--------------------------");
}
}

/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);

//Create and set up the window.
JFrame frame = new JFrame("TableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Create and set up the content pane.
TableDemo newContentPane = new TableDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);

//Display the window.
frame.pack();
frame.setVisible(true);
}

public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}

how to use tables ?

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