17 lines
505 B
Java
17 lines
505 B
Java
package test;
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public class RegexTest {
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public static void main(String[] args) {
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String regex = "^[a-zA-Z][a-zA-Z1-9]*$";
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String testString = "Abc123"; // 测试字符串
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boolean matches = testString.matches(regex);
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if (matches) {
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System.out.println("字符串仅由字母和数字（1-9）组成");
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} else {
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System.out.println("字符串包含非字母或非数字（1-9）的字符");
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}
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}
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}
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