我的 effective java -- 构建器
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public class TestConstruct {
private final int serviceSize;
private final int servings;
private final int cal;
private final String fat;
private final boolean istrue;
public static class Builder {
private final int serviceSize;
private final int servings;
private ?int cal = 0;
private ?String fat = "";
private ?boolean istrue = false;
public Builder(int serviceSize, int servings){
this.serviceSize = serviceSize;
this.servings = servings;
}
public Builder calMe(int val){
cal = val;
return this;
}
public Builder fatMe(String val){
fat = val;
return this;
}
public Builder istrueMe(boolean val){
istrue = val;
return this;
}
public TestConstruct build(){
return new TestConstruct(this);
}
}
public TestConstruct(Builder builder){
serviceSize = builder.serviceSize;
servings = builder.servings;
cal = builder.cal;
fat = builder.fat;
istrue = builder.istrue;
}
public void printAll(){
System.out.println(serviceSize);
System.out.println(servings);
System.out.println(cal);
System.out.println(fat);
System.out.println(istrue);
}
}
