37 lines
1.1 KiB
Java
37 lines
1.1 KiB
Java
package chapter6;
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public class Example24 {
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// 泛型方法：验证订单信息
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public static <T> boolean verify(T info) {
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System.out.println("正在验证: " + info);
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if (info instanceof String) {
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// 验证订单号
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String orderNo = (String) info;
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return orderNo.length() == 10; // 假设订单号必须是10位
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}
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else if (info instanceof Double || info instanceof Integer) {
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// 验证订单金额
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double amount = Double.parseDouble(info.toString());
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return amount > 0; // 金额必须大于0
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}
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return false;
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}
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public static void main(String[] args) {
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// 验证订单号
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boolean isValidOrderNo = verify("A123456789");
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System.out.println("订单号是否合法: " + isValidOrderNo);
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// 验证订单金额
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boolean isValidAmount = verify(99.9);
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System.out.println("订单金额是否合法: " + isValidAmount);
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// 验证负数金额
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boolean isValidNegative = verify(-10.0);
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System.out.println("负数金额是否合法: " + isValidNegative);
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}
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}
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