作业
Topic sourcepublic class RoyaltyIncome implements Income{ protected double income; public RoyaltyIncome(double income){ this.income=income; } @Override public double getTax(){ return this.income*0.2; }}
public class SalaryIncome implements Income{ protected double income; // TODO public SalaryIncome(double income){ this.income=income; } @Override public double getTax(){ if(income>=5000) { return (income-5000)*0.15; } else{ return 0; } }}
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