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public static int getLineNumber(Exception e){
StackTraceElement[] trace =e.getStackTrace();
if(trace==null||trace.length==0) return -1; //
return trace[0].getLineNumber();
}
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System.out.println(“Current line:”+getLineNumber(new Exception()));
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public class TestEnum {
/*×îÆÕͨµÄö¾Ù*/
public enum ColorSelect {
red, green, yellow, blue;
}
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import java.io.*;
public class Test {
public static String convert(String s) {
if (s == null || s.length() == 0)
return s;
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