java顺序表的删除代码

数据结构,用JAVA编写顺序表

直接用数组或者ArrayList实现相应的功能,行吗?Java没有指针,LinkedList无法模拟

java如何实现对数据表里面的数据删除(最好给个具体代码范例)

连接数据库

public class DBManager {

//定义数据库连接的URL

//定义数据库的用户名

private static final String USERNAME = "sa";

//定义数据库密码

private static final String PASSWORD = "sa";

//定义一个连接的引用,使用单例模式

private static Connection conn = null;

//使用静态块来注册驱动

//类加载时自动执行代码块

static {

//反射com.microsoft.sqlserver.jdbc.SQLServerDriver.class

try {

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

} catch (ClassNotFoundException e) {

e.printStackTrace();

}

//获得连接

//在程序使用过程中始终只有1个对象存在

//使用单例模式来给Connection赋值

public static Connection getConnection(){

if(conn == null){

conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);

} catch (SQLException e) {

return conn;

/**

* 关闭的一些操作 , 优化

* @param conn

* @param stat

* @param rs

*/

public static void close(Connection conn,Statement stat,ResultSet rs){

try{

if(conn != null){

conn.close();

if(stat != null){

stat.close();

if(rs != null){

rs.close();

}catch(SQLException e){

public static void close(Connection conn,Statement stat){

public static void main(String[] args){

Connection conn = DBManager .getConnection();

System.out.println(conn);

接口

public interface IStudentDao {

public void deleteStudent(int xh);

实现

public class StudentDAOimpl implements IStudentDao {

public void deleteStudent(int xh) {

String sql = "delete from tb_student where xh = ?";

PreparedStatement ps = conn.prepareStatement(sql);

ps.setInt(1, xh);

ps.executeUpdate();

System.out.println("成功删除");

如何用JAVA语言建立含有若干个元素的顺序表,并实现插入,删除,查找等基本操作

java 中的List接口就是顺序存储的集合机构,底层是用数组实现的,检索性能高,插入和删除性能较低,因为涉及到移位.代码简单演示：

ListInteger list = new ArrayListInteger(); // 定义一个用于存放整数的集合list,

list.add(100);

System.out.println(list.toString()); // 查看结果

int a = list.get(0) ; // 这将找出list中的第一个元素100,赋值给a

System.out.println(a); // 100

------------------------------------------------------------------------------------------------------

比较粗略,详细内容请查看ArrayList 的 API .祝你学习进步.

java使用顺序表制作电子通讯录,实现添加,删除和排序的功能.

翻了半天找到以前写的,只写了部分,你可以参考一下

public class Data {

private long stuNumber;

private String stuName;

private long stuScore;

public Data(){}

public Data(long stuNumber,String stuName,long stuScore){

this.stuNumber=stuNumber;

this.stuName=stuName;

this.stuScore=stuScore;

public void setStuNumber(long stuNumber){this.stuNumber=stuNumber;}

public void setStuName(String stuName){this.stuName=stuName;}

public void setStuScore(long stuScore){this.stuScore=stuScore;}

public long getStuNumber(){return stuNumber;}

public String getStuName(){return stuName;}

public long getStuScore(){return stuScore;}

public interface LinkListIntf {

public void initList();//初始化

public int size();//获得长度

public void insertData(int n,Data listdata);

public void getData(int n);

public void deleteData(int n);

public void printList();

public class ListTest {

public static void main(String[] args) {

int i;

Sqlist sq = new Sqlist();

Data pdata;

System.out.println("--------Start----------");

System.out.println("--------Init------------");

sq.initList();

System.out.println("--------Init Over--------");

Scanner sc = new Scanner(System.in);

System.out.println("输入元素：");

Data data = new Data();

System.out.print("学号 姓名 分数：");

data.setStuNumber(sc.nextLong());

data.setStuName(sc.next());

data.setStuScore(sc.nextLong());

sq.insertData(sq.size()+1, data);

while (true) {

System.out.println("----请选择操作------");

int choose = sc.nextInt();

switch (choose){

case 1:

System.out.print("插入位置：");

int n = sc.nextInt();

sq.insertData(n,data);

break;

System.out.print("打印结果： ");

sq.printList();

System.out.print("请输入要删除的元素的位置： ");

int deleteLocation = sc.nextInt();

sq.deleteData(deleteLocation);

System.out.print("请输入要查询的元素的位置: ");

int findLocation = sc.nextInt();

System.out.print("元素内容是： ");

sq.getData(findLocation);

return;

public class Sqlist implements LinkListIntf{

public static final int MAX_LEN = 100;

public int listLength;

private Data[] listdata = new Data[MAX_LEN];

//初始化顺序表

public void initList(){this.listLength=0;}

public int size(){return this.listLength;}

public void insertData(int n,Data data){

if(listLengthMAX_LEN)

System.out.println("表满！");

if(n1 || nlistLength+1)

System.out.println("插入位置越界！");

for(i=listLength-1;i=n-1;i--)

listdata[i+1]=listdata[i];

listdata[n-1]=data;

listLength++;

public void deleteData(int n){

if(n1 || nlistLength-1){System.out.println("删除位置不正确！");return;}

for(int i=n;ilistLength;i++)

listdata[i-1]=listdata[i];

listLength--;

System.out.println("----删除成功！-----");

public void getData(int n){

if(n1 || nlistLength){System.out.println("查找不正确！");}

System.out.println(listdata[n-1].getStuNumber()+" "+listdata[n-1].getStuName()+" "+listdata[n-1].getStuScore());

//return 0;

public void printList(){

System.out.println("表中信息为：");

for(i=0;ilistLength;i++) {

String format = String.format(listdata[i].getStuName()+" "+listdata[i].getStuNumber()+" "+listdata[i].getStuScore());

System.out.println(format);

用Java语言编写数据结构中顺序表的插入删除查找代码并实现

public class Test {

int ai = 1;

String data = "data";

String[] array = insertArrar(data, ai, length);

data = delArray(array, ai, length);

System.out.println(data);

public static String[] insertArrar(String data,int ai,int length){

String[] array = new String[length];

array[ai] = data;

return array;

public static String delArray(String[] array,int ai,int length){

String data = "";

data=array[ai];

array[ai]=null;

for(int i = 0; iarray.length;i++){

System.out.println(array[i]);

return data;

java怎么实现表格的行删除

java中表格的删除是通过事件监控来实现的,示例代码如下:

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");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

String[] columnNames = {"A","B"}; //列名

tableModel = new DefaultTableModel(tableVales,columnNames);

table = new JTable(tableModel);

JScrollPane scrollPane = new JScrollPane(table); //支持滚动

getContentPane().add(scrollPane,BorderLayout.CENTER);

//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: "));

panel.add(aTextField);

panel.add(new JLabel("B: "));

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

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);

panel.add(updateButton);

final JButton delButton = new JButton("删除");

delButton.addActionListener(new ActionListener(){//添加事件

if(selectedRow!=-1) //存在选中行

tableModel.removeRow(selectedRow); //删除行

panel.add(delButton);

* @param args

// TODO Auto-generated method stub

JTableDefaultTableModelTest jTableDefaultTableModelTest = new JTableDefaultTableModelTest();

jTableDefaultTableModelTest.setVisible(true);

以上就是土嘎嘎小编为大家整理的java顺序表的删除代码相关主题介绍,如果您觉得小编更新的文章只要能对粉丝们有用,就是我们最大的鼓励和动力,不要忘记讲本站分享给您身边的朋友哦！！