问题:
Given the following code, which method declarations, when inserted at the indicated position, will not cause the program to fail compilation?()
public class Qdd1f {
public long sum(long a, long b) {
return a + b;
}
// insert new method declaration here
}
A . public int sum(int a, int b) { return a + b; }
B . public int sum(long a, long b) { return 0; }
C . abstract int sum();
D . private long sum(long a, long b) { return a + b; }
E . public long sum(long a, int b) { return a + b; }
Given the following code, which method declarations, when inserted at the indicated position, will not cause the program to fail compilation?()
public class Qdd1f {
public long sum(long a, long b) {
return a + b;
}
// insert new method declaration here
}
● 参考解析
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