swing 表格模型增加删除行和列

怼烎@ 2022-06-15 08:50 387阅读 0赞

package table;
    
    import java.awt.BorderLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.util.Vector;
    import java.util.concurrent.BrokenBarrierException;
    
    import javax.swing.*;
    import javax.swing.table.DefaultTableModel;
    import javax.swing.table.TableColumnModel;
    
    public class Tab1 extends JFrame implements ActionListener{
    	JTable jt1;
    	DefaultTableModel tableM;
    	JScrollPane jsp1;
    	JButton jb1,jb2,jb3,jb4;
    	JPanel jp1;
    	public static void main(String[] args) {
    		new Tab1();
    	}
    	Tab1(){
    		String[] name = new String[]{"列1","列2","列3","列4","列5"};
    		String[][] data = new String[5][5];
    		int value = 1;
    		for (int i=0; i<data.length; i++){
    			for(int j=0; j<data[i].length; j++){
    				data[i][j] = String.valueOf(value++);
    			}
    		}
    		//初始化表格模型，设置表头和数据
    		tableM = new DefaultTableModel(data, name);
    		//初始化表格，与模型建立联系
    		jt1 = new JTable(tableM);
    		//把表格放入滚动窗中
    		jsp1 = new JScrollPane(jt1);
    	
    		
    		jb1 = new JButton("添加列");
    		jb2 = new JButton("添加行");
    		jb3 = new JButton("删除列");
    		jb4 = new JButton("删除行");
    		jp1 = new JPanel();
    		this.add(jp1, BorderLayout.SOUTH);
    		jp1.add(jb1);
    		jp1.add(jb2);
    		jp1.add(jb3);
    		jp1.add(jb4);
    		this.add(jsp1);
    		
    		jb1.addActionListener(this);
    		jb2.addActionListener(this);
    		jb3.addActionListener(this);
    		jb4.addActionListener(this);
    		this.setSize(400, 400);
    		this.setVisible(true);
    		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    	}
    	@Override
    	//进行增加，删除表格都是对表格模型操作，与table无关
    	public void actionPerformed(ActionEvent e) {
    		if (e.getSource().equals(jb1)){
    			tableM.addColumn("新增列");
    		}
    		//新增一行
    		if (e.getSource().equals(jb2)){
    			tableM.addRow(new Vector());
    		}
    		/**
    		 * 删除列 做法： 先通过getColumnCount获取表格模型列数，通过 setColumnCount设置
    		 * setColumnCount如果新大小   小于   当前大小，则将丢弃索引 columnCount 处及其之后的所有列
    		 */
    		if (e.getSource().equals(jb3)){
    			int col = tableM.getColumnCount()-1;
    			tableM.setColumnCount(col);
    		}
    		if (e.getSource().equals(jb4)){
    			int row = tableM.getRowCount()-1;
    			if(row < 0){
    				return ;
    			}
    			tableM.removeRow(row);
    		}
    	}
    }