java中表格的删除是通过事件监控来实现的，示例代码如下:
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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableModel;
//维护表格
public class JTableDefaultTableModelTest extends JFrame{
private DefaultTableModel tableModel; //表格模型对象
private JTable table;
private JTextField aTextField;
private JTextField bTextField;
public JTableDefaultTableModelTest()
{
super();
setTitle("表格");
setBounds(100,100,500,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String[] columnNames = {"A","B"}; //列名
String [][]tableVales={{"A1","B1"},{"A2","B2"},{"A3","B3"},{"A4","B4"},{"A5","B5"}}; //数据
tableModel = new DefaultTableModel(tableVales,columnNames);
table = new JTable(tableModel);
JScrollPane scrollPane = new JScrollPane(table); //支持滚动
getContentPane().add(scrollPane,BorderLayout.CENTER);
//jdk1.6
//排序:
//table.setRowSorter(new TableRowSorter(tableModel));
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); //单选
table.addMouseListener(new MouseAdapter(){ //鼠标事件
public void mouseClicked(MouseEvent e){
int selectedRow = table.getSelectedRow(); //获得选中行索引
Object oa = tableModel.getValueAt(selectedRow, 0);
Object ob = tableModel.getValueAt(selectedRow, 1);
aTextField.setText(oa.toString()); //给文本框赋值
bTextField.setText(ob.toString());
}
});
scrollPane.setViewportView(table);
final JPanel panel = new JPanel();
getContentPane().add(panel,BorderLayout.SOUTH);
panel.add(new JLabel("A: "));
aTextField = new JTextField("A4",10);
panel.add(aTextField);
panel.add(new JLabel("B: "));
bTextField = new JTextField("B4",10);
panel.add(bTextField);
final JButton addButton = new JButton("添加"); //添加按钮
addButton.addActionListener(new ActionListener(){//添加事件
public void actionPerformed(ActionEvent e){
String []rowValues = {aTextField.getText(),bTextField.getText()};
tableModel.addRow(rowValues); //添加一行
int rowCount = table.getRowCount() +1; //行数加上1
aTextField.setText("A"+rowCount);
bTextField.setText("B"+rowCount);
}
});
panel.add(addButton);
final JButton updateButton = new JButton("修改"); //修改按钮
updateButton.addActionListener(new ActionListener(){//添加事件
public void actionPerformed(ActionEvent e){
int selectedRow = table.getSelectedRow();//获得选中行的索引
if(selectedRow!= -1) //是否存在选中行
{
//修改指定的值：
tableModel.setValueAt(aTextField.getText(), selectedRow, 0);
tableModel.setValueAt(bTextField.getText(), selectedRow, 1);
//table.setValueAt(arg0, arg1, arg2)
}
}
});
panel.add(updateButton);
final JButton delButton = new JButton("删除");
delButton.addActionListener(new ActionListener(){//添加事件
public void actionPerformed(ActionEvent e){
int selectedRow = table.getSelectedRow();//获得选中行的索引
if(selectedRow!=-1) //存在选中行
{
tableModel.removeRow(selectedRow); //删除行
}
}
});
panel.add(delButton);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JTableDefaultTableModelTest jTableDefaultTableModelTest = new JTableDefaultTableModelTest();
jTableDefaultTableModelTest.setVisible(true);
}
}
//删除元素为全1的行，不知道是不是你要的功能
public class Demo {
public static void main(String[] args) {
int[][] a={
{0,0,0,0,0},
{0,1,0,1,0},
{1,1,1,1,1},
{1,1,1,1,1},
{0,1,1,1,1},
{1,1,1,1,1}
};
len=a.length;
System.out.println("删除满行前：");
output(a);
cutFullLine(a);
System.out.println("删除满行后：");
output(a);
}
static void output(int[][] a) {
for(int i=0;ilen;i++) {
for(int j=0;ja[i].length;j++) {
System.out.print(""+a[i][j]+" ");
}
System.out.println();
}
}
static void cutFullLine(int[][] a) {
for(int i=0;ilen;) {
if(isFull(a[i])) {
for(int j=i+1;jlen;j++) {
a[j-1]=a[j];
len--;
}
}
else {
i++;
}
}
}
static boolean isFull(int[] line) {
boolean r=true;
for(int i=0;iline.length;i++) {
if(1!=line[i]) {
r=false;
break;
}
}
return r;
}
static int len;
}
用“”替换文件中的内容达到删除目的
import java.io.InputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Scanner;
import java.io.FileNotFoundException;
import java.io.IOException;
public class zifutihuan
{
protected static void rep(String ch)
{
BufferedReader bis = null;
FileWriter bos = null;
String s = null;
try
{
bis = new BufferedReader(new FileReader("1.txt"));
bos = new FileWriter("2.txt");
while(null != (s = bis.readLine()))
{
s = s.replaceAll(ch,"");
System.out.println(s);
s= s+"\r\n";
bos.write(s);
}
bos.close();
bis.close();
s = null;
}
catch(FileNotFoundException e)
{
System.out.println("未找到文件\n");
}
catch(IOException ee)
{
System.out.println("aaa");
}
}
public static void main(String args[])
{
rep("123");
}
}
