Created
August 1, 2018 14:41
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public class Foo { | |
// immutability | |
private final int a; | |
private final int b; | |
private final int c; | |
private final int d; | |
private final int e; | |
public static class Builder { | |
private final int a; | |
private final int b; | |
private int c = 0; | |
private int d = 0; | |
private int e = 0; | |
public Builder(int a, int b){ | |
this.a = a; | |
this.b = b; | |
} | |
public Builder c(int val) {c = val; return this;} | |
public Builder d(int val) {d = val; return this;} | |
public Builder e(int val) {e = val; return this;} | |
public Foo build() { | |
return new Foo(this); | |
} | |
} | |
private Foo(Builder builder) { | |
a = builder.a; | |
b = builder.b; | |
... | |
} | |
} | |
Foo foo = new Foo.Builder(10, 2).c(10).d(20).e(30).build(); |
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