29 lines
974 B
Java
29 lines
974 B
Java
package chapter7;
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import java.io.FileWriter;
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import java.io.IOException;
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public class Example09 {
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public static void main(String[] args) {
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FileWriter writer = null; // 在try外声明，以便finally中可以访问
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try {
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writer = new FileWriter("note.txt");
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writer.write("这是第一行\n");
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writer.write("这是第二行\n");
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System.out.println("文件写入成功！");
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} catch (IOException e) {
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System.out.println("写入文件出错：" + e.getMessage());
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} finally {
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// 在finally中确保关闭资源
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if (writer != null) { // 防止writer未初始化就抛出异常
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try {
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writer.close(); // close()方法也可能抛出IOException
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} catch (IOException e) {
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System.out.println("关闭文件出错：" + e.getMessage());
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}
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}
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}
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}
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}
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