NetBeans Swing GUI构建器中自定义组件实例化异常的解决方案

public class CustomTable extends JTable {
    public CustomTable(int a , int b ,int c){    
        // ... 初始化逻辑 ...
    }
    // ... 其他方法和内部类 ...
}

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import javax.swing.JTable;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableCellRenderer;

public class CustomTable extends JTable {

    // 现有的带参数构造函数
    public CustomTable(int a, int b, int c) {
        // 设置表头渲染器，使用传入的颜色参数
        getTableHeader().setDefaultRenderer(new CustomTableHeader(a, b, c));
        getTableHeader().setPreferredSize(new Dimension(0, 70));
        // 设置单元格渲染器
        setDefaultRenderer(Object.class, new CustomTableCell());
        setRowHeight(45);
        setBorder(null);
        this.setOpaque(true);
        this.setBackground(new java.awt.Color(10, 100, 10)); // 示例背景色
        // 禁用所有单元格编辑
        this.setDefaultEditor(Object.class, null);
    }

    // 新增的公共无参构造函数，用于GUI构建器
    public CustomTable() {
        // 调用带参数构造函数，提供一组默认的颜色值
        // 这里使用一个深灰色作为默认表头背景色
        this(50, 50, 50);
        // 如果您希望无参构造函数有不同的默认行为，也可以在此处直接编写初始化逻辑
    }

    // ... (CustomTableHeader 和 CustomTableCell 内部类保持不变) ...

    private class CustomTableHeader extends DefaultTableCellRenderer {
        int l, k, m;

        public CustomTableHeader(int a, int b, int c) {
            setcolor(a, b, c);
            setHorizontalAlignment(CENTER); // 居中对齐
            setForeground(Color.WHITE); // 默认字体颜色
        }

        public void setcolor(int a, int b, int c) {
            this.l = a;
            this.k = b;
            this.m = c;
        }

        @Override
        public Component getTableCellRendererComponent(JTable table, Object o, boolean b, boolean b1, int i, int i2) {
            Component c = super.getTableCellRendererComponent(table, o, b1, b1, i, i2);
            c.setBackground(new java.awt.Color(l, k, m));
            c.setFont(new Font("AraAlmBon", Font.BOLD, 14));
            return c;
        }
    }

    private class CustomTableCell extends DefaultTableCellRenderer {
        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            if (isSelected) {
                if (row % 2 == 0) {
                    c.setBackground(new java.awt.Color(33, 103, 153)); // 选中偶数行
                } else {
                    c.setBackground(new java.awt.Color(29, 86, 127)); // 选中奇数行
                }
            } else {
                if (row % 2 == 0) {
                    c.setBackground(new java.awt.Color(50, 50, 50)); // 未选中偶数行
                } else {
                    c.setBackground(new java.awt.Color(30, 30, 30)); // 未选中奇数行
                }
            }
            c.setForeground(new Color(200, 200, 200));
            setBorder(new EmptyBorder(0, 5, 0, 5));
            return c;
        }
    }

    // 示例中还有一个 CustomTablef，这里省略，因为它似乎没有被使用且是空的
    // private class CustomTablef extends DefaultTableCellRenderer { /* ... */ }
}