java自动关闭教程



import java.io.BufferedReader; import java.io.FileOutputStream; import java.io.FileReader; import java.io.IOException; import java.io.PrintStream;

public class AutoCloseTest {

</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> AutoCloseTest() { } </span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">static</span> <span style="color: rgba(0, 0, 255, 1)">void</span> main(String[] args) <span style="color: rgba(0, 0, 255, 1)">throws</span><span style="color: rgba(0, 0, 0, 1)"> IOException { BufferedReader br </span>= <span style="color: rgba(0, 0, 255, 1)">new</span> BufferedReader(<span style="color: rgba(0, 0, 255, 1)">new</span> FileReader("t.txt"<span style="color: rgba(0, 0, 0, 1)">)); Throwable var2 </span>= <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">; </span><span style="color: rgba(0, 0, 255, 1)">try</span><span style="color: rgba(0, 0, 0, 1)"> { PrintStream pr </span>= <span style="color: rgba(0, 0, 255, 1)">new</span> PrintStream(<span style="color: rgba(0, 0, 255, 1)">new</span> FileOutputStream("a.txt"<span style="color: rgba(0, 0, 0, 1)">)); Throwable var4 </span>= <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">; </span><span style="color: rgba(0, 0, 255, 1)">try</span><span style="color: rgba(0, 0, 0, 1)"> { System.out.println(br.readLine()); pr.println(</span>"我是要成为海贼王的男人"<span style="color: rgba(0, 0, 0, 1)">); } </span><span style="color: rgba(0, 0, 255, 1)">catch</span><span style="color: rgba(0, 0, 0, 1)"> (Throwable var27) { var4 </span>=<span style="color: rgba(0, 0, 0, 1)"> var27; </span><span style="color: rgba(0, 0, 255, 1)">throw</span><span style="color: rgba(0, 0, 0, 1)"> var27; } </span><span style="color: rgba(0, 0, 255, 1)">finally</span><span style="color: rgba(0, 0, 0, 1)"> { </span><span style="color: rgba(0, 0, 255, 1)">if</span> (pr != <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">) { </span><span style="color: rgba(0, 0, 255, 1)">if</span> (var4 != <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">) { </span><span style="color: rgba(0, 0, 255, 1)">try</span><span style="color: rgba(0, 0, 0, 1)"> { pr.close(); } </span><span style="color: rgba(0, 0, 255, 1)">catch</span><span style="color: rgba(0, 0, 0, 1)"> (Throwable var26) { var4.addSuppressed(var26); } } </span><span style="color: rgba(0, 0, 255, 1)">else</span><span style="color: rgba(0, 0, 0, 1)"> { pr.close(); } } } } </span><span style="color: rgba(0, 0, 255, 1)">catch</span><span style="color: rgba(0, 0, 0, 1)"> (Throwable var29) { var2 </span>=<span style="color: rgba(0, 0, 0, 1)"> var29; </span><span style="color: rgba(0, 0, 255, 1)">throw</span><span style="color: rgba(0, 0, 0, 1)"> var29; } </span><span style="color: rgba(0, 0, 255, 1)">finally</span><span style="color: rgba(0, 0, 0, 1)"> { </span><span style="color: rgba(0, 0, 255, 1)">if</span> (br != <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">) { </span><span style="color: rgba(0, 0, 255, 1)">if</span> (var2 != <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">) { </span><span style="color: rgba(0, 0, 255, 1)">try</span><span style="color: rgba(0, 0, 0, 1)"> { br.close(); } </span><span style="color: rgba(0, 0, 255, 1)">catch</span><span style="color: rgba(0, 0, 0, 1)"> (Throwable var25) { var2.addSuppressed(var25); } } </span><span style="color: rgba(0, 0, 255, 1)">else</span><span style="color: rgba(0, 0, 0, 1)"> { br.close(); } } } } 

}

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