示例

public class ClassA {
private String a;
private Statement s;
public void methodA {

try {
s.execute(a, 3);
} catch ( Error e ) {
//...
}
}

}
解决方案
将“a”声明为 final。

public class ClassA {
private final String a;
private Statement s;
public void methodA {

try {
s.execute(a, 3);
} catch ( Error e ) {
//...
}
}

}