おなじ変数名を２回使える罠 | Codetter（こーどったー）

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Class Test1{
    
    int a;
    String b;
    public Test1(){
        a = 5;
        b = "びー"; 
    }
//中略
    public void setAB(int a, String b){
        this.a = a;
        this.b = b;
    }
}
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