Duplicate :
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==========$ cat -n Main.java 1 class Main { 2 <U extends Integer, V extends Double> Number cond1(boolean z, U x1, V x2) { 3 return (z? x1 : x2); 4 } 5 } ==========$ newjavac Main.java + exec /usr/j2sdk1.5.0/bin/javac -J-esa -source 1.5 -target 1.5 -XDdev Main.java Main.java:3: cannot find symbol symbol : method intValue() location: bound of type variable U return (z? x1 : x2); ^ Fatal Error: Unable to find method intValue ==========$
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